leukemia vax question

My kitten, DOB december 5.  got her first FeLV vax in late March. in our city/possibly country (south american), there is a shortage as in the lab that sells them won't sell them until the end of the year.  Since then, she got her rabies vaccine. Does one leukemia vax (without the booster) do much? What if the booster is given 6-8 weeks after the first one (and a rabies vax was given in that time)? i mean in terms of efficacy/anything you can think of as a genius vet I don’t understand science. I do understand that no vet clinic where we live can purchase these, but unsure if /to what extent it would be worth it to either 1. Call every clinic within xyz km to see if anyone happens to have one laying around or 2. Possibly drive to some other city only after verifying someone has one- the booster- in terms of the stuff i wrote about.  Thank you so so much!   Where we live FeLV is a major issue, so I am so grateful in advance

Hello - that sounds like a total headache for you, because of course you want your cat to be covered.  My understanding has always been that two vaccinations are needed in order to be reasonably sure that your cat is protected against FeLV, but this is usually determined by tests done by the manufacturer.  Each of those vaccinations currently on the market, is licensed for certain uses, the 'rules' for the use of that drug being laid out in the printed data sheet.  The data sheet is usually dense text; a white pamphlet with tiny black writing, often found in a tablet box or handed out with a vaccination.  In the UK, there is also a book of parmacological data sheets published every year that will contain an up to date copy.  Copies of the data sheet may also be available on the internet if you look up the manufacturer.  If a drug is given according to the specifications in the data sheet, it is suggested that your cat should be covered.  Otherwise, no guarentees can be made.  You could ask the vaccine company whether they think their drug will wotk given a larger interval between them, but if they dont have evidence, they will say 'no.'  It is not always about timing of administration;  vaccinations may not work if, for example, a pet is very seriously ill and immunocompromised when the vaccination is given. Calling other vets to try to track some down,  or indeed the manufacturer of the vaccine (who might well be tracing the situation), sounds to be a sensible course of action.

hi. thank you so much. I have had such a challenging three years with my dog + health,  I was dreaming that maybe there  would be some easy wonderful answer that would = it’s totally fine. I think I knew that was not possible, but I am so grateful for your detailed response and thoughtful suggestions.   Her unexpected appearance in our lives has given us so much and I think I was hoping to avoid whatever i will never be able to learn or do for my dog.       I was already on the fence about letting her be an outdoor cat, due to other factors, as much as she is half bird/half monkey  I had some time to learn, pre-spay, so thank you again.       If ok to ask another kinda related question- in general, as in for UK cat parents, do you recommend any type of testing before a kitten is spayed?  We have a few weeks before her vet will spay her.  And while I will trust his guidance on that, it helps me to learn what others do, even though I know our cultural/geographic context/methods/everything= totally different. thank you so so much.