Not the same. Feline Leukemia is a virus. Human Leukemia is a form of cancer. You really need to lay off the wacky weed. Also, there is no "AIDS immunization". Specifically because there over 15 different strains of the HIV virus, and it is a rapid mutating virus (which is why there are so many strains). Immunizing against HIV is about as likely as immunizing against the common cold. Both have the same problem, they just mutate to damned fast.
Feline Leukemia is caused by a virus. HPV is a virus that causes cancer. Probably some Hollywood throat cancers as well as cervix and penis cancer (chop chop) Heliobactor pylori is a bacteria associated with stomach cancer. Yes indeed germs, both bacterial and virus are known to cause cancer in people. We have vaccinations for kitty AIDS and kitty Leukemia but not for people. We do have an HPV vaccine now. Try some "wacky weed" it just may improve your thinking ability. Oh and you are so very wrong as to why there is no human AIDS vaccine. Moi, M.D. ret. r > g Mushroom, are you ?