Coronaviruses are a large family of viruses. Some coronaviruses cause cold-like illnesses in people, while others cause illness in certain types of animals, such as cattle, camels, and bats. Some coronaviruses, such as canine and feline coronaviruses, infect only animals and do not infect humans.
Risk of animals spreading the virus that causes COVID-19 to people
Some coronaviruses that infect animals can be spread to humans and then spread between people, but this is rare. This is what happened with the virus that caused the current outbreak of COVID-19, with the virus likely originating in bats. The first reported infections were linked to a live animal market, but the virus is now spreading from person to person.
The virus that causes COVID-19 spreads mainly from person to person through respiratory droplets from coughing, sneezing, and talking. Recent studies show that people who are infected but do not have symptoms likely also play a role in the spread of COVID-19. At this time, there is no evidence that animals play a significant role in spreading the virus that causes COVID-19. Based on the limited information available to date, the risk of animals spreading COVID-19 to people is considered to be low. More studies are needed to understand if and how different animals could be affected by COVID-19.
Risk of people spreading the virus that causes COVID-19 to animals
We are still learning about this virus, but it appears that it can spread from people to animals in some situations, especially after close contact with a person sick with COVID-19.
For information on how to protect pets from possible infection with SARS-CoV-2, see If You Have Pets.
Animals that can be infected with the virus that causes COVID-19
We know that cats, dogs, and a few other types of animals can be infected with SARS-CoV-2, the virus that causes COVID-19, but we donâ€™t yet know all of the animals that can get infected. There have been reports of animals being infected with the virus worldwide.
- A small number of pet cats and dogs have been reported to be infected with the virus in several countries, including the United States. Most of these pets became sick after contact with people with COVID-19.
- Several lions and tigersexternal icon at a New York zoo tested positive for SARS-CoV-2 after showing signs of respiratory illness. Public health officials believe these large cats became sick after being exposed to a zoo employee who was infected with SARS-CoV-2. All of these large cats have fully recovered.
- SARS-CoV-2 has been reported in mink (which are closely related to ferrets) on multiple farms in the Netherlands, Denmark, Spain, and the United Statesexternal icon.
- SARS-CoV-2 infection in farmed mink has been characterized by respiratory disease and an increased mortality rate.
- Because some workers on these farms had symptoms of COVID-19, it is likely that infected farm workers were the source of the mink infections.
- Currently, there is no evidence that animals play a significant role in the spread of SARS-CoV-2 to people. However, reports from infected mink farms in the Netherlands suggest that in these environments there is the possibility for spread of SARS-CoV-2 from mink to humans.
- Additionally, some farm cats and dogs on mink farms in Europe also tested positive for SARS-CoV-2, suggesting they had been exposed to the virus.
CDC, USDA, and state public health and animal health officials are working in some states to conduct active surveillance of SARS-CoV-2 in pets, including cats, dogs, and other small mammals, that had contact with a person with COVID-19. These animals are being tested for SARS-CoV-2 infection and also tested to see whether the pet develops antibodies to this virus. This work is being done to help us better understand how common SARS-CoV-2 infection might be in pets as well as the possible role of pets in the spread of this virus.
The U.S. Department of Agriculture (USDA) maintains a listexternal icon of all animals with confirmed infections with SARS-CoV-2 in the United States.
Research on animals and COVID-19
Research on SARS-Cov-2 in animals is limited, but studies are underway to learn more about how this virus can affect different animals.
- Recent research shows that ferrets, cats, and golden Syrian hamsters can be experimentally infected with the virus and can spread the infection to other animals of the same species in laboratory settings.
- A number of studies have investigated non-human primates as models for human infection. Rhesus macaques, cynomolgus macaques, Grivets, and common marmosets can become infected SARS-CoV-2 and become sick in a laboratory setting.
- Mice, pigs, chickens, and ducks do not seem to become infected or spread the infection based on results from these studies.
- Data from one study suggest some dogs can get infected but might not spread the virus to other dogs as easily compared to cats and ferrets, which can easily spread the virus to other animals of the same species
These findings were based on a small number of animals, and do not show whether animals can spread infection to people. More studies are needed to understand if and how different animals could be affected by COVID-19.