A newly vaccinated cat vomits and has inflammation, which is a sign of vaccine allergy. Vomiting, orofacial swelling, and loss of mental appetite are common symptoms of vaccine allergy. If the frequency of vomiting is not frequent, you can observe it first and it will usually resolve on its own. If vomiting continues and becomes more severe, you need to go to the hospital for examination to see whether it is an allergy caused by the vaccine or other diseases.

Notes on cat vaccination:

1. Before the cat is vaccinated, the cat should be given a physical examination to see if it is healthy. It is convenient to vaccinate only when the cat is healthy. Otherwise, not only will the cat's resistance not be increased, but it may also be life-threatening.

2. Cats are not suitable for vaccination under many circumstances. For example, if the cat is sick, the cat is pregnant, the cat is unwell, etc., it is not suitable for vaccination.

3. Do not let cats get vaccinated on an empty stomach. It is recommended that when taking a cat for vaccination, you should give the cat something to eat before taking it to the hospital. Vaccination on an empty stomach will cause hypoglycemia in cats.