No. The coronavirus is highly contagious and most cats will be exposed to it at some point during their life. FCoV is shed through feces, so cats who share a litter box or groom one another are exposed to the benign form of the virus. Cats who have a healthy immune system will pass the coronavirus with little to no issue other than a bout of diarrhea and/or cold-like symptoms.
Cats who have a weakened or not fully developed immune system may not be able to pass the coronavirus, and the virus mutates into FIP. Once mutated into FIP, the virus is no longer contagious.
There is believed to be a genetic component with FIP, so biological litter mates may share the same genetic predisposition that allows FCoV to mutate. A family history of FIP does unfortunately increase the likelihood that siblings will develop FIP.
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