FeLV Vaccinations?

About a month ago, I adopted a 2 year old male cat (Diesel) from an individual who previously adopted him from the local humane society at 5 months of age. He was never vaccinated or tested for FeLV. However, I recently took him to the vet and was told that he is in good health. 

Fast forward to last week, I adopted a 2 month old female kitten (Luna) from a lady in the neighborhood. She had several other cats living in her house, and I am worried that perhaps Luna may have been in contact with the virus. 

Both cats like to share food and water, and the same litter box too so I'm concerned that if one of them is FeLV positive that the other may be prone to getting it as well. 

What are the chances that Diesel is infected being an adult and not showing any signs or symptoms at all? What are the chances that Luna is infected from being in a house full of cats? 

I guess my main question is, would I be able to see any signs of the virus in either cat in this point? 

Please help!

If you need to know, have both cats tested. The disease can remain asymptomatic for a long time so, no, you wouldn't see symptoms until they're really sick.

If you don't let them outside and both cats test negative, there's no reason to give them the vaccine (it has a chance of side effects). But I do recommend having them tested so you know for sure.

First, thank you for taking in these cats.
In answer to your main question: doubtful you would see any sign of illness, unless the disease is very advance, which doesn't appear to be the case.
I'm a little confused: was Diesel tested for FeLV, and did he test negative? I don't know the policy of every humane society, but I would think/hope one of the policies is to automatically test every cat they adopt out for FIV and FeLV/FeLK and, if the result is positive, not adopt out the cat.
Note that if a cat is vaccinated against FeLK, she will test positive (i.e., possibly incorrectly positive).
It is impossible to know whether Luna was exposed to the FIV/FeLV virus. She should be tested ASAP for FIV/FeLK. And spayed/neutered if not already (at two months, she is just old enough to be S/N, assuming she weighs at least two pounds). It really depends on whether their system can fight either virus insofar as the outcome. Cats with FIV lcan live long, reasonably happy lives; FeLV, not so much.
As an aside, I volunteer at a cat sanctuary that has FIV and FELV cats (in separate rooms, apart from the general population cats.) The FeLV cats are just like any other cat, deameanor wise, some are super friendly, some are aloof. Looking at them you wouldn't know they are sick.
Here is an article about FELV and one about FIV.

Thank you both for your input


I suppose you're right, the only way I know for sure is to get them both tested. Diesel was NOT tested for FeLV, I called the shelter to confirm this.