There is a very strong version of feline calici virus called VS - FCV infection. (cat-health-guide.org)
Veterinarians are worried about this virus becoming an epidemic because most cats are not vaccinated against the mutant strain of calici virus. (itchmo.com)
Repeat in 10 - 14 days, Intranasal feline herpes - calici virus vaccination in high risk areas. (lowchensaustralia.com)