A multitude of respected, published studies document that risk of horizontal transmission in shelters, homes, or clinics is reduced to statistically insignificant in sterilized cats, even those who cohabitate with negative cats in multi-pet homes and in group housing in shelters.
Similarly, a multitude of respected, published studies document that there is no statistical difference in lifespan between viral positive and viral negative cats.
Again, ample studies exist proving that viral positive cats in the typical pet home are most frequently asymptomatic for the duration of their lives. Gathered data on comorbidities include manageable conditions such as gingivitis.
*Thank you to Austin Pets Alive! for having clear and concise information that we can pass on to our adopters! A lot of the language used is borrowed from them.*