Vaccine is widely recognized as reducing the prevalence and impact of many diseases. Pet vaccines and human vaccinations are the same in principle. They are both antigens that make the body produce antibodies after injection. So it is not surprising that there are side effects. The side effects of vaccines are mainly divided into acute side effects and chronic side effects.

Acute side effects are acute allergic reactions that occur after taking medication or drug injection, which can cause symptoms such as shock, difficulty breathing, abnormal heartbeat, acute anemia, etc., and even life-threatening. It usually occurs within 30 minutes to 2 hours after vaccination, and sometimes within 24 hours. In the early stage, there will be symptoms such as redness and swelling around the eyes and mouth, dilated pupils, white gums, and erythema on the body. So after vaccinating the pet, the veterinarian usually asks Miaowang to observe in the hospital for half an hour before going home without any abnormalities. On the way home, the owner should observe the status of the pet specifically and observe closely for at least 8 hours.

After the pet is vaccinated, small lumps may appear at the injection site, most of which will slowly fade over time and there will be no major problems. However, if this lump does not recede after a few weeks, it is very likely that the side effects of the vaccine will occur, and the probability of such side effects is about one in 5,000. The specific cause of the disease is still unknown.