>From the moderator of the FIP website.  I hope this helps.
Hi Caroline,I reposted my message about vaccination.I found some info regarding 
vaccination of retro-virus infected 
 of retrovirus-infected catsRetrovirus-infected cats should be housed 
indoorsand isolated from unvaccinated cats to diminish theirlikelihood of 
infecting others and to reduce their exposureto other infectious agents or 
trauma. The AdvisoryPanel recommends that core vaccines (FPV, FHV-1,FCV, and 
rabies virus) be administered to FeLV-infectedcats; noncore vaccines should be 
given only if therisk of patient exposure justifies their use. Cats 
infectedwith FeLV may not be able to mount adequateimmune responses to 
vaccination against rabies virusand perhaps to other vaccines as well.c 
Therefore, protectioninduced by vaccines in FeLV-infected cats maynot be 
comparable to that achieved in uninfected cats.Experimental evidence indicates 
that FIV-infectedcats are capable of mounting immune responses toadministered 
antigens, except during the terminalphase of infection, although these 
responses may bedelayed or diminished.31-35 Results of studies32,36 todetermine 
whether immune stimulation (eg, vaccination)accelerates the course of 
FIV-induced immunodeficiencyare conflicting, but a potential trade-off 
toprotection from disease by vaccination is progressionof FIV infection 
secondary to increased viral production.The Advisory Panel recommends that core 
vaccinesbe administered to FIV-infected cats, but noncorevaccines should be 
given only if the risk of patientexposure justifies their use. In 1 study,37 
cats experimentallyinfected with FIV developed vaccine-inducedpanleukopenia 
when given modified-live FPV vaccines.Whether cats naturally infected with FIV 
are atincreased risk of developing vaccine-induced diseasefrom residual 
virulence of infectious vaccines is notknown; however, administration of 
noninfectious vaccinesis preferred whenever available.Kind regards,Marleen
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