Can an 8 year old cat, living for all those years in an indoor, 2 cat only household, develop corona-virus symptoms from an infection caught as a kitten --- 8 full years before? Can this virus be dormant inside a cat for 8+ years before suddenly showing up? Our boy came down with a terrible upper respiratory infection one year ago. Exactly one year later, he contracted full blown, wet fip and we lost him within days. It was completely out of the blue as he was never sick a day in his life. I'm so confused and broken hearted. Can anyone help me understand where this could have come from?