Cats allergic to vaccines require immediate injection of desensitizing drugs. When the cat's allergic symptoms are severe and life-threatening, emergency treatment is required immediately, otherwise the cat may become comatose or even die. After the cat recovers, it is necessary to supplement the cat's nutrition and improve its immunity. Then it is possible to eliminate the allergy and can be vaccinated normally.

Adverse reactions in cats after vaccination:

1. Cats will experience pain and swelling at the injection site, which will usually subside on their own after two or three days. If the injection site is injured, Hair follicles may also cause local hair loss or sarcoma proliferation.

2. Cats may be depressed, unwilling to move or eat. Some cats may also have a low fever, which will usually return to normal in about a day or two.

3. Cats may have vaccine allergic reactions, such as itching all over the body, redness and swelling of the face and eyes, convulsions, etc. In severe cases, it may cause severe vomiting and diarrhea, or even shock and death.