Worshipers offer Eid al-Fitr prayers outside a mosque in Tehran, Iran, on Sunday, May 24.

Olivia Grant, right, hugs her grandmother, Mary Grace Sileo through a plastic drop cloth hung up on a homemade clothes line on May 24 in Wantagh, New York.

Retired U.S. Marine Corps Brian Carabine replaces flags at the U.S. Veterans gravesite of the South End Cemetery in preparation for Memorial Day weekend on May 23, in East Hampton, New York.

Graduates turn their tassels during a drive-thru graduation for Faith Lutheran High School at the Las Vegas Motor Speedway, on Friday, May 22 in Las Vegas, Nevada.

Workers wear protective gear as they start a cremation oven in Ecatepec, Mexico, on Thursday, May 21.

A health worker wears a face shield while checking a patient’s temperature at a hospital in Toluca, Mexico, on May 21. Mexico had reported its highest number of new daily cases.

People in Srinagar, India, lower the coffin of a woman who died from the coronavirus.

Levi Tinker, resident historian and general manager of the TCL Chinese Theatre in Hollywood, makes an announcement inside the theater’s empty auditorium on Monday, May 18. It was the theater’s 93rd birthday celebration.

People practice social distancing in New York’s Domino Park on Sunday, May 17.

Nurses in Nairobi, Kenya, take part in a Zumba fitness class in the parking lot of the Kenyatta University Teaching, Referral and Research Hospital on May 17.

Mary Faye Cochran sings “You Are My Sunshine” to her son Stacey Smith from her senior-living facility in Smyrna, Georgia, on May 10. It was Mother’s Day in the United States.

Pope Francis delivers a blessing from the window of his studio overlooking an empty St. Peter’s Square on May 10.

The San Isidro cemetery in Mexico City, which was temporarily closed to the public to limit the spread of Covid-19, is seen in this aerial photo from May 10.

Mary Washington speaks through a window to her daughter Courtney Crosby and grandchild Sydney Crosby during a Mother’s Day celebration at her senior-living facility in Smyrna.

A Briarcliff High School student participates in a parade of graduating seniors through Briarcliff Manor, New York, on May 9.

People wear face masks while watching a Victory Day military parade in Minsk, Belarus, on May 9. The parade marked the 75th anniversary of the Allied victory over Nazi Germany in World War II.

A man rides past social-distancing markers in front of a shop in Brussels, Belgium, on May 9.

A man pauses as he places the casket of a relative into a van at a busy New York funeral home on May 9.

Health-care workers wait for citizens to arrive at the Anna International Airport in Chennai, India, on May 9. People were arriving in Chennai from Dubai, United Arab Emirates.

A man wearing a face mask cycles through Chinatown in Yokohama, Japan, on May 8. Prime Minister Shinzo Abe announced that Japan will extend its state of emergency until the end of May.

American citizens who were stranded in Syria due to the pandemic arrive at the Lebanese border on their way to the Beirut airport, where they would be leaving for the United States.

During a protest in Washington on May 7, members of National Nurses United stand among empty shoes that they say represent nurses who have died from Covid-19.

A worker helps disinfect a subway train in New York on May 6. The subway syatem was shut down for a deep-cleaning.

High school students study in a classroom in Wuhan, China, as they returned to school on May 6.

A nursery is disinfected in Cannes, France, on May 6. Nurseries in France were to gradually reopen on May 11.

Refrigerated trucks are seen at a morgue that opened in New York to assist overwhelmed funeral homes.

Michigan state police prevent protesters from entering the chamber of the Michigan House of Representatives on April 30. The protesters were unhappy with the state’s stay-at-home order. Gov. Gretchen Whitmer recently extended the order through May 15, though restrictions were relaxed so some businesses could reopen.

This aerial photo shows surfers accessing Sydney’s Tamarama Beach on April 29. Several Sydney beaches reopened for exercise only.

A barber wears protective equipment as he cuts a customer’s hair in Lausanne, Switzerland, on April 27.

Health workers at a coronavirus testing center in New Delhi attend to a colleague who fainted due to exhaustion on April 27.

Pitrik van der Lubbe waves from a boom lift to his 88-year-old father, Henk, at his father’s nursing home in Gouda, Netherlands, on April 24. Pitrik had not seen his father in more than four weeks.

Protesters shout slogans against Lebanese Central Bank governor Riad Salamé as they block Hamra Street in Beirut, Lebanon, on April 23. Anti-government protesters have been demonstrating in Beirut as they continue to endure one of its worst-ever economic crises.

A boy plays hopscotch at his home in A Coruna, Spain, on April 23.

A dentist wears protective equipment while treating a patient in Den Bosch, Netherlands, on April 22.

Biology teachers prepare to hold an exam at a secondary school in Berlin on April 22.

A volunteer in Yangon, Myanmar, spreads calcium oxide on a road to help prevent the spread of the coronavirus on April 22.

Migrants wave from balconies at a hotel in Kranidi, Greece, on April 21. The shelter, which hosts 470 asylum seekers, was placed in isolation after a pregnant resident tested positive for the novel coronavirus.

A man disinfects a ceiling lamp at the ÄŒobanija Mosque in Sarajevo, Bosnia and Herzegovina, on April 21.

A nurse holds a newborn baby, wearing a face shield as a protective measure, at a maternity facility in Jakarta, Indonesia, on April 21.

Health workers at Madrid’s La Paz Hospital hold a minute of silence to remember Joaquin Diaz, the hospital’s chief of surgery who died because of the coronavirus.

A woman applauds from the balcony of her Paris home to show support for health care workers on April 20.

Mayor’s office workers wear protective suits as they conduct a census in a Bogota, Colombia, neighborhood on April 19. They were trying to find out how many families needed to be provided with food.

A woman sticks her tongue out of a torn mask at a Reopen Maryland rally outside the State House in Annapolis, Maryland, on April 18. Residents in multiple states have been protesting stay-at-home orders.

Newly married Tyler and Caryn Suiters embrace following their marriage ceremony in Arlington, Virginia, on April 18. The Rev. Andrew Merrow and his wife, Cameron, were the only other attendees at the ceremony, which was held at St. Mary’s Episcopal Church.

Abed Khankan cuts a customer’s hair outdoors in Malmo, Sweden, on April 17.

Two women walk to rent a small paddle boat by the Vltava River in Prague, Czech Republic, on April 17.

Cars sit at a newly opened drive-in cinema in Dortmund, Germany, on April 17. It’s in front of a former blast furnace.

Funeral workers in Manaus, Brazil, prepare the grave of a woman who is suspected to have died from the coronavirus.

A member of the Don Bosco Foundation delivers food from the Fraternitas Project, which serves vulnerable families in Seville, Spain, on April 16.

Police officers try on personal protective equipment in Amritsar, India, on April 16.

Workers in Nairobi, Kenya, fumigate the streets and the stalls of the City Park Market on April 15.

Novice Buddhist monks wear face shields at the Molilokayaram Educational Institute in Bangkok, Thailand, on April 15.

A woman sits on a bench at an empty metro station in Prague, Czech Republic, on April 15.

Health workers in Barcelona, Spain, acknowledge people who were showing their support from their balconies and windows.

Workers from the garment sector in Dhaka, Bangladesh, block a road during a protest demanding payment of unpaid wages.

A woman meets with her son in a “Quarantainer,” a container devised to allow people to visit each other without risking the spread of coronavirus, at a care center in Utrecht, Netherlands, on April 14.

Firefighters transfer a patient from an ambulance in Montpelier, France, on April 14.

A cemetery worker pauses while digging graves at the San Vicente cemetery in Cordoba, Argentina, on April 14.

Workers produce protective face masks at a new factory near Tehran, Iran, on April 14.

Medical workers in Istanbul clap for 107-year-old Havahan Karadeniz as she is discharged from the hospital on April 13. She had just recovered from the coronavirus.

A flower shop employee destroys unsold flowers in St. Petersburg, Russia, on April 13.

A police officer requests that people return to return to their homes during a gathering that marked the Bisket Jatra festival in Bhaktapur, Nepal.

A doctor in a protective chamber tests a patient for coronavirus at a walk-in kiosk in Chennai, India, on April 13.

Musicians play their instruments for a retirement home in Karben, Germany, on April 13.

A woman covers herself with plastic as heavy rain falls outside a New York hospital on April 13.

People in Jerusalem attend the funeral of Eliyahu Bakshi-Doron, Israel’s former chief rabbi who died from coronavirus complications.

In Rio de Janeiro, the Christ the Redeemer statue was illuminated to make Christ look like a doctor on April 12.

A couple stands in a park along the Yangtze River in Wuhan, China.

Priest-in-charge Angie Smith uses her phone to broadcast an Easter service from a churchyard in Hartley Wintney, England, on April 12.

Children wave to a person dressed as the Easter Bunny during a neighborhood parade in Haverford, Pennsylvania, on April 10.

Health workers in Leganes, Spain, cry during a memorial for a co-worker who died because of the coronavirus.

Volunteers spray disinfectant in a favela in Rio de Janeiro on April 10.

A health care worker holds the hand of a coronavirus patient being moved at a hospital near Barcelona, Spain, on April 9.

Service boats spray water in London to show support for health care workers on April 9.

Employees of Hyundai Card, a credit card company, sit behind protective screens as they eat in an office cafeteria in Seoul, South Korea, on April 9.

People wait in their cars for the San Antonio Food Bank to begin food distribution on April 9.

A worker disinfects a carved cross at the Salt Cathedral in Zipaquira, Colombia, on April 8.

A cake shop employee in Athens, Greece, prepares chocolate Easter bunnies with face masks on April 8.

Californians Sarah and Aaron Sanders, along with their children, use video conferencing to celebrate a Passover Seder with other family members on April 8.

Cars in Wuhan line up to leave at a highway toll station.

Rabbi Yaakov Kotlarsky places Passover Seder to-go packages into a car trunk in Arlington Heights, Illinois, on April 7.

A man is sprayed with disinfectant prior to going to a market in Tirana, Albania, on Monday, April 6.

Izzie, left, and Tippi wear ventilated dog masks in Philadelphia on April 6.

Police detain a doctor in Quetta, Pakistan, who was among dozens of health care workers protesting a lack of personal protective equipment on April 6.

A Catholic priest sprinkles holy water on devotees during Palm Sunday celebrations in Quezon City, Philippines, on Sunday, April 5.

Paramilitary members unload provisions in Kampala, Uganda, on Saturday, April 4. It was the first day of government food distribution for people affected by the nation’s lockdown.

A police officer wearing a coronavirus-themed outfit walks in a market in Chennai, India, to raise awareness about social distancing.

A woman in Moscow cooks while watching Russian President Vladimir Putin address the nation over the coronavirus pandemic.

The hashtag “stayhome” is projected onto the Matterhorn mountain that straddles Switzerland and Italy on April 1. The mountain was illuminated by Swiss artist Gerry Hofstetter, who is transforming buildings, monuments and landscapes all over the world to raise awareness during the pandemic.

Volunteers load food bags on a truck to deliver them to low-income families in Panama City, Panama, on April 1.

Designer Friederike Jorzig adjusts a mannequin wearing a wedding dress and a face mask at her store in Berlin on March 31.

People pray next to the grave of musician Robson de Souza Lopes after his burial in Manaus, Brazil, on March 31. According to authorities at the Amazonas Health Secretary, the 43-year-old died after being diagnosed with the novel coronavirus.

Chris Lyndberg hands out a free lunch to a truck driver at a rest area along Interstate 10 in Sacaton, Arizona, on March 31. The Arizona Trucking Association was giving away 500 Dilly’s Deli lunches to show its appreciation for truck drivers who have been delivering medical supplies, food and other necessities during the coronavirus pandemic.

Farmers deliver vegetables to a customer in Saint-Georges-sur-Cher, France, on March 29.

People listen from their homes as priests conduct Sunday mass from a church roof in Rome on March 29.

A worker fixes partitions at a quarantine center in Guwahati, India, on March 28.

Devices used in diagnosing the coronavirus are inspected in Cheongju, South Korea, on March 27. The devices were being prepared for testing kits at the bio-diagnostic company SD Biosensor.

A student does homework in Bratislava, Slovakia, on March 27. Schools have been shut down across the world, and many children have been receiving their lessons online.

A National Guard truck sprays disinfectant in Caracas, Venezuela, on March 27.

Pope Francis prays in an empty St. Peter’s Square on March 27.

Coffins carrying coronavirus victims are stored in a warehouse in Ponte San Pietro, Italy, on March 26. They would be transported to another area for cremation.

Members of Iran’s Revolutionary Guard prepare to take part in disinfecting the city of Tehran on March 25.

Lydia Hassebroek attends a ballet class from her home in New York on March 25.

People visit the Beijing Zoo on March 25 after it reopened its outdoor exhibits to the public.

A woman suspected of having coronavirus is helped from her home by emergency medical technicians Robert Sabia, left, and Mike Pareja, in Paterson, New Jersey, on March 24.

People practice social distancing as they wait for takeout food at a shopping mall in Bangkok, Thailand, on March 24.

People arrive at the South Municipal Cemetery in Madrid to attend the burial of a man who died from the coronavirus.

Passengers arrive at Hong Kong International Airport on March 23.

Giuseppe Corbari holds Sunday Mass in front of photographs sent in by his congregation members in Giussano, Italy, on March 22. Many religious services are being streamed online so that people can worship while still maintaining their distance from others.

People clap from balconies to show their appreciation for health care workers in Mumbai, India.

A woman attends a Sunday service at the Nairobi Baptist Church in Nairobi, Kenya, on March 22. The service was streamed live on the internet.

A Syrian Red Crescent member sprays disinfectant along an alley of the historic Hamidiyah market in Damascus, Syria.

A funeral service is held without family members in Bergamo, Italy, on March 21.

A member of the Syrian Violet relief group disinfects tents at a camp for displaced people in Kafr Jalis, Syria, on March 21.

A doctor examines Juan Vasquez inside a testing tent at St. Barnabas Hospital in New York on March 20.

Medical staff wearing protective suits ride down an escalator at Moscow’s Sheremetyevo International Airport on March 18.

A patient in a biocontainment unit is carried on a stretcher in Rome on March 17.

A pedestrian walks a dog through a quiet street in New York on March 17.

People gather to collect free face masks in New Delhi on March 17.

Students at the Attarkiah Islamic School wear face masks during a ceremony in Thailand’s southern province of Narathiwat on March 17.

People wait outside a Woolworths store in Sunbury, Australia on March 17. Australian supermarket chains announced special shopping hours for the elderly and people with disabilities so that they can shop in less crowded aisles.

A member of Spain’s Military Emergencies Unit carries out a general disinfection at the Malaga airport on March 16.

Displaced families near Atme, Syria, attend a workshop aimed at spreading awareness about the coronavirus.

A police officer checks the temperatures of bus passengers at a checkpoint in Manila, Philippines, on March 16.

Flowers are stored prior to their destruction at a flower auction in Aalsmeer, Netherlands, on March 16. Lower demand due to the coronavirus outbreak is threatening the Dutch horticultural sector, forcing the destruction of products.

Body temperatures are scanned as people enter the Buddhist temple Wat Pho in Bangkok, Thailand, on March 13.

Two nuns greet neighbors from their balcony in Turin, Italy, on Sunday, March 15.

Passengers wait for their flights at Marrakesh Airport in Morocco on March 15.

US Vice President Mike Pence takes a question during a White House briefing about the coronavirus on March 15.

A Sea World employee sprays disinfectant in Jakarta, Indonesia, on Saturday, March 14.

A member of the White House physician’s office takes a media member’s temperature in the White House briefing room on March 14. It was ahead of a news conference with President Donald Trump and Vice President Mike Pence.

Reporters in Arlington, Virginia, sit approximately 4 feet apart during a briefing by Marine Corps Gen. Kenneth F. McKenzie on March 13.

People walk past a closed Broadway theater on March 13 after New York canceled all gatherings over 500 people.

A Costco customer stands by two shopping carts in Richmond, California, on March 13.

A teacher works in an empty classroom at the Pompeu Fabra University in Barcelona, Spain.

A woman looks at an empty bread aisle in Antwerp, Belgium, on March 13.

Employees of the Greek Parliament wear plastic gloves ahead of the swearing-in ceremony for Greek President Katerina Sakellaropoulou.

A motorcyclist drives through disinfectant sprayed in Jammu, India, on March 13.

Workers prepare to construct an additional building on a hospital on the outskirts of Moscow.

Paul Boyer, head equipment manager of the NHL’s Detroit Red Wings, wheels out equipment bags in Washington on March 12. The NHL is among the sports leagues that have suspended their seasons.

Students leave Glacier Peak High School in Snohomish, Washington, on March 12. Beginning the following day, schools in the Snohomish school district planned to be closed through April 24.

An Uber Eats delivery biker stands at a deserted Piazza di Spagna in Rome.

Workers in protective suits disinfect Istanbul’s Dolmabahce Palace on March 11.

A person wearing a face mask walks outside of a shopping mall in Beijing on March 11.

Medical staff in Wuhan, China, celebrate after all coronavirus patients were discharged from a temporary hospital on March 9.

Sumo wrestlers attend a tournament in Osaka, Japan, that was being held behind closed doors because of the coronavirus outbreak.

A couple rides a bicycle at a park in Seoul, South Korea, on March 7.

A volunteer from Blue Sky Rescue uses fumigation equipment to disinfect a residential compound in Beijing on March 5.

Municipal workers are seen at the Kaaba, inside Mecca’s Grand Mosque. Saudi Arabia emptied Islam’s holiest site for sterilization over coronavirus fears, an unprecedented move after the kingdom suspended the year-round Umrah pilgrimage.

Passengers react as a worker wearing a protective suit disinfects the departure area of a railway station in Hefei, China, on March 4.

Teachers at the Nagoya International School in Japan conduct an online class for students staying at home as a precaution against the spread of coronavirus.

Soldiers spray disinfectant throughout a shopping street in Seoul.

A Muslim worshipper attends a mass prayer against coronavirus in Dakar, Senegal, on March 4. It was after cases were confirmed in the country.

People wear face masks in New York’s Times Square on March 3. New York reported its first case of coronavirus two days earlier.

A security guard stands on the Shibuya Sky observation deck in Tokyo on March 3.

Medical staff stand outside a hospital in Daegu, South Korea, on March 1.

Health care workers transfer a patient at the Life Care Center in Kirkland, Washington, on March 1. The long-term care facility is linked to confirmed coronavirus cases.

British Prime Minister Boris Johnson visits a London laboratory of the Public Health England National Infection Service.

Tomoyuki Sugano, a professional baseball player on the Yomiuri Giants, throws a pitch in an empty Tokyo Dome during a preseason game on February 29. Fans have been barred from preseason games to prevent the spread of the coronavirus.

Commuters wearing masks make their way to work during morning rush hour at the Shinagawa train station in Tokyo on February 28.

Medical staff transport a coronavirus patient within the Red Cross hospital in Wuhan on February 28.

A bank clerk disinfects banknotes in China’s Sichuan province on February 26.

A child wearing a protective face mask rides on a scooter in an empty area in Beijing.

A Catholic devotee wears a face mask as he is sprinkled with ash during Ash Wednesday services in Paranaque, Philippines, on February 26.

People disinfect Qom’s Masumeh shrine in Tehran, Iran, on February 25.

A worker in Daegu stacks plastic buckets containing medical waste from coronavirus patients on February 24.

Paramedics carry a stretcher off an ambulance in Hong Kong on February 23.

A team of volunteers disinfects a pedestrian bridge in Bangkok, Thailand.

A man rides his bike in Beijing on February 23.

Hospital personnel in Codogno, Italy, carry new beds inside the hospital on February 21. The hospital is hosting some people who have been diagnosed with the novel coronavirus.

Doctors look at a CT scan of a lung at a hospital in Xiaogan, China, on February 20.

A medical worker rests at the isolation ward of the Red Cross hospital in Wuhan on February 16.

Authorities watch as the Westerdam cruise ship approaches a port in Sihanoukville, Cambodia, on February 13. Despite having no confirmed cases of coronavirus on board, the Westerdam was refused port by four other Asian countries before being allowed to dock in Cambodia.

A worker has his temperature checked on a shuttered commercial street in Beijing on February 12.

Beds are made in the Wuhan Sports Center, which has been converted into a temporary hospital.

A child rides a scooter past a police officer wearing protective gear outside the Hong Mei House in Hong Kong on February 11. More than 100 people evacuated the housing block after four residents in two different apartments tested positive for the coronavirus.

A police officer, left, wears protective gear as he guards a cordon at the Hong Mei House in Hong Kong on February 11.

Chinese President Xi Jinping has his temperature checked during an appearance in Beijing on February 10.

People participating in a Lunar New Year Parade in New York City hold signs reading, “Wuhan stay strong!” on February 9.

A worker wearing a protective suit uses a machine to disinfect a business establishment in Shanghai, China, on February 9.

Workers in protective gear walk near the Diamond Princess cruise ship docked in Yokohama on February 7.

A woman grieves while paying tribute to Li at Li’s hospital in Wuhan on February 7.

The Anthem of the Seas cruise ship is seen docked at the Cape Liberty Cruise Port in Bayonne, New Jersey, on February 7. Passengers were to be screened for coronavirus as a precaution, an official with the Centers for Disease Control and Prevention told CNN.

A light installation is displayed by striking members of the Hospital Authority Employees Alliance and other activists at the Hospital Authority building in Hong Kong on February 7.

Passengers are seen on the deck of the Diamond Princess cruise ship, docked at the Yokohama Port on February 7.

Flight attendants wearing face masks make their way through Don Mueang Airport in Bangkok on February 7.

Workers check sterile medical gloves at a latex-product manufacturer in Nanjing, China, on February 6.

A woman wears a protective mask as she shops in a Beijing market on February 6.

This aerial photo shows the Leishenshan Hospital that is being built in Wuhan to handle coronavirus patients.

A passenger shows a note from the World Dream cruise ship docked at the Kai Tak cruise terminal in Hong Kong on February 5.

A mask is seen on a statue in Beijing on February 5.

A dog in Beijing wears a makeshift mask constructed from a paper cup.

Striking hospital workers in Hong Kong demand the closure of the border with mainland China on February 4.

The Diamond Princess cruise ship sits anchored in quarantine off the port of Yokohama on February 4. It arrived a day earlier with passengers feeling ill.

A medical worker wearing protective gear waits to take the temperature of people entering Princess Margaret Hospital in Hong Kong on February 4.

Medical workers in protective suits help transfer patients to a newly completed field hospital in Wuhan.

People wearing protective overalls talk outside a Wuhan hotel housing people in isolation on February 3.

A man stands in front of TV screens broadcasting a speech by Hong Kong Chief Executive Carrie Lam on February 3. Lam said the city would shut almost all border-control points to the mainland.

A colleague sprays disinfectant on a doctor in Wuhan on February 3.

Medical workers move a coronavirus patient into an isolation ward at the Second People’s Hospital in Fuyang, China, on February 1.

Children wear plastic bottles as makeshift masks while waiting to check in to a flight at the Beijing Capital Airport on January 30.

Passengers in Hong Kong wear protective masks as they wait to board a train at Lo Wu Station, near the mainland border, on January 30.

A volunteer wearing protective clothing disinfects a street in Qingdao, China, on January 29.

Nanning residents line up to buy face masks from a medical appliance store on January 29.

Lyu Jun, left, a member of a medical team leaving for Wuhan, says goodbye to a loved one in Urumqi, China, on January 28.

A charter flight from Wuhan arrives at an airport in Anchorage, Alaska, on January 28. The US government chartered the plane to bring home US citizens and diplomats from the American consulate in Wuhan.

South Korean President Moon Jae-in wears a mask to inspect the National Medical Center in Seoul on January 28.

Hong Kong Chief Executive Carrie Lam, center, attends a news conference in Hong Kong on January 28. Lam said China will stop individual travelers to Hong Kong while closing some border checkpoints and restricting flights and train services from the mainland.

Workers at an airport in Novosibirsk, Russia, check the temperatures of passengers who arrived from Beijing on January 28.

US Health and Human Services Secretary Alex Azar speaks during a news conference about the American public-health response.

Two residents walk in an empty park in Wuhan on January 27. The city remained on lockdown for a fourth day.

A person wears a protective mask, goggles and coat as he stands in a nearly empty street in Beijing on January 26.

Medical staff members bring a patient to the Wuhan Red Cross hospital on January 25.

People wear protective masks as they walk under Lunar New Year decorations in Beijing on January 25.

Construction workers in Wuhan begin to work on a special hospital to deal with the outbreak on January 24.

A couple kisses goodbye as they travel for the Lunar New Year holiday in Beijing on January 24.

Workers manufacture protective face masks at a factory in China’s Hubei Province on January 23.

Shoppers wear masks in a Wuhan market on January 23.

Passengers are checked by a thermography device at an airport in Osaka, Japan, on January 23.

People wear masks while shopping for vegetables in Wuhan on January 23.

A militia member checks the body temperature of a driver in Wuhan on January 23.

Passengers wear masks as they arrive at the Ninoy Aquino International Airport in Manila, Philippines, on January 23.

A customer holds boxes of particulate respirators at a pharmacy in Hong Kong on January 23.

Passengers wear masks at the high-speed train station in Hong Kong on January 23.

A woman rides an electric bicycle in Wuhan on January 22.

People in Guangzhou, China, wear protective masks on January 22.

People go through a checkpoint in Guangzhou on January 22.

Medical staff of Wuhan’s Union Hospital attend a gathering on January 22.

Health officials hold a news conference in Beijing on January 22.