Anecdotal evidence I have noticed of late.
I came down with covid a month ago. It resolved within a week to ten days, oof that fever and headache.
A friend 300km away had his house down with it a week later. Their dog then started displaying respiratory virus symptoms. I have not visited these folks in almost 2yrs.
My ex has cats who live 100km in the other direction. They are sneezing and have goopy eyes now too.
I moved two weeks ago. This is the only time my cat has experienced the outdoors in years. As she was carried to the car / new place.
She is now exhibiting respiratory virus symptoms.
All anecdoatal, far too small sample size, and it could be the stress of the move reignited something else for her... But i have noticed the odd seeming frequency of overlap with canine and feline respiratory issues, and people, of late.
I was born to the wrong culture, said in Canadian.