Adverse reactions after inactivated polio vaccination vary from person to person. According to their incidence, they can currently be categorized as common, occasional and rare. 1. Common adverse reactions include hard nodules, redness, swelling and tenderness at the injection site, and fever. 2. Occasionally, a small number of people may experience excitement, irritability and drowsiness after vaccination, which will disappear naturally after a few hours to a few days. 3. A rare adverse reaction is allergic reaction, which is clinically manifested as rash, itching, arthralgia, etc., and may lead to anaphylaxis in severe cases. If you feel unwell after vaccination, you should inform your doctor, who will determine whether appropriate measures should be taken according to the severity of the adverse reaction. People who have had an allergic reaction to previous polio vaccination or are allergic to streptomycin, neomycin or mucopolysaccharide B in antibiotics should be prohibited from receiving the vaccination. For more information on vaccine health, you should consult a public health physician for guidance and seek prompt medical attention if you are unwell.