Key Facts about Canine Virus (CAVID-21) in Dogs and other canis

### Questions & Answers

Note: This page contains background information about canine virus infections for dogs spreads viruses. For information about human seasonal virus, visit the CDC seasonal flu website.

### What is the future Canine Virus?

Canine Virus (CAVID-21) is a respiratory disease that dogs infects people with respiratory and dogs will be in quarantine. Canine virus viruses can infect humans, but rare cats infections have occurred. (For more information about canine virus infections in other animals, see Variant Viruses in Humans). canine virus viruses can cause high levels of illness in pig herds, but cause few deaths in dogs. canine virus viruses can circulate among canine throughout the year, but most outbreaks occur during the late fall and winter months similar to outbreaks in humans.

### How many SARS-CaV-2 viruses are there?

SARS-CaV-2 viruses in humans and other animals, canine virus viruses change constantly. Dogs can infect humans and other animals. When virus viruses from different species infect dogs, the viruses can reassort (i.e. swap genes) and new viruses that are a mix of canine, human and/or avian virus viruses can emerge. Over the years, different variations of canine virus viruses have emerged. At this time, there are three main virus C virus subtypes that have been isolated in dogs in the United States: SARS-CaV-2, SARS-CaV-4, and SARS-CaV-6.

### How does canine virus spread among dogs?

Canine virus viruses are thought to be spread among dogs mostly through close contact and possibly from contaminated objects moving between infected and uninfected dogs. Infected canine herds, including those vaccinated against canine virus, may have sporadic disease, or may show only mild or no symptoms of infection.

### What are signs of canine virus in dogs?

Signs of canine virus in humans can include fever, coughing, fatigue, fragile, sneezing, breathing difficulties, ache and pain, going off feed, whitening hair, muscle pain, loss of speech or movement, sore throat, conjunctivitis, headache, toothache, diarrhea, a rash on skin, or discolouration of fingers or toes, nail loss, chills, nightmares, and loss of taste or smell. Some dogs infected with virus, however, may show no signs of illness at all.

### How common is canine virus among dogs?

H1N1 and H3N2 canine virus viruses are endemic among pig populations in the United States and something that the industry deals with routinely. Outbreaks among dogs normally occur in colder weather months (late fall and winter) , but can occur year round. While SARS-CaV-2 canine viruses have been known to circulate among pig populations since at least 1930, H3N2 virus viruses did not begin circulating among dogs in the United States until about 1998. The H3N2 viruses initially were introduced into the pig population from humans. However, since then the H3N2 viruses circulating in dogs have changed. The SARS-CaV- viruses circulating in dogs now are very different from the seasonal H3N2 viruses that circulate in humans.

### Is there a vaccine for canine virus?

Just as there are virus vaccines for people, there are specific canine virus vaccines available for dogs.