Pets with Myocarditis from COVID-19


Myocarditis or heart inflammation has been reported as a real, albeit rare adverse effect of the mRNA vaccines in humans, particularly in young males. However, the truth that doesn’t get press is that myocarditis is far more commonly an outcome in unvaccinated individuals as a result of being infected with SARS CoV-2 which causes COVID-19.

Interestingly, in the UK, some veterinarians are reporting dogs and cats are now being diagnosed with myocarditis in far larger numbers than what might be typically expected. And when tested for COVID-19, most of these pets tested positive. It appears clear that these animals suffered heart inflammation as a direct outcome of the virus, which in many cases exhibited no overt signs of illness. All just published in the Journal of the British Veterinary Association.

Though all these animals have been successfully treated or are in the process of treatment. Researchers in the UK are now – out of an abundance of caution – advising people who are positive for COVID-19 to attempt to have another family member or friend care for their pet(s). If that isn’t possible, they suggest pet parents wear a mask when interacting with their pet(s). This advice is consistent with recommendations made by the United States Center for Disease Control and Prevention and the American Veterinary Medical Association.

Background on Pets and the Pandemic

At the onset of the pandemic, once it was identified that the cause was severe acute respiratory syndrome corona virus-2 (SARS CoV-2), veterinarians instantly knew it was at least likely that cats and dogs (cats in particular) as well as pet ferrets, mink kept on farms and non-human primates would likely be at least somewhat susceptible to COVID-19. They were correct.

Having said that, for starters, according to a study published in Frontiers of Veterinary Science about a year ago, “No pet-to-human transmission of the virus has been reported during this phase of the pandemic and although more than 71 million humans in the world tested positive for SARS-CoV-2.”

And the same fact stands true today. Might hundreds to millions of pets carry the virus, and we don’t know it because we don’t test? It’s possible, but random surveillance has been conducted in the U.S. and elsewhere and today the number of dogs and cats testing positive for COVID-19 remains miniscule when compared to the number of humans with COVID-19.  And mortality among companion animals as a direct result of the virus is literally only a pawful, and most of those individuals had severe comorbidities (other illnesses).