There is no treatment or ‘cure’ for this virus. Vaccination against FELV will greatly increase your cats chances of clearing the infection if exposed instead of becoming persistently infected, which is most likely if your cat is unvaccinated. Cats can start a leukemia vaccine series as early as 8 weeks of age. Boosters are given every 1-3 years depending on the amount of exposure risk, and the type of vaccination used. Do not treat him/her for all these things at once, or else the cat will just feel even worse. Wait a week or two before treating him/her for a second condition. If your cat is frightened or agitated by anything in your house, get rid of the cause. Ask your family and friends to be quiet and to avoid being loud when inside the house. Keep your cat's environment warm enough. He/she may need more warmth than a non-infected cat. Snug blankets and sleeping areas are essential. Higher-quality food will improve your cat's condition and is an assurance that your cat is getting the required nutrients that cheaper food lacks. Do not feed any home or commercially prepared raw diets as cats with FELV have a compromised immune system and could become ill from harmful bacteria this way. Don’t feed solely fish, as this is lacking in many essential nutrients. Keep all of your cat's litter boxes, food bowls, water bowls, etc. very clean. This means daily cleaning, without fail. If you're not around to do it, someone else must be tasked with this chore.

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Write a summary of the previous text in Indonesian:
Berikan vaksin jika kucing yang belum divaksinasi mengalami kontak dengan kucing penderita FeLV. Berilah kucing Anda obat untuk mengatasi cacing, tungau telinga, kutu, dan parasit lainnya yang bisa membuat kucing tidak nyaman. Jagalah agar suasana rumah Anda bebas dari stres. Berilah makanan kucing berkualitas tinggi dengan menu yang seimbang. Pastikan semua peralatan kucing dalam keadaan bersih.