What are the adverse reactions of oral polio vaccine?

Polio vaccine generally refers to the poliovirus vaccine, which can prevent poliomyelitis and is mainly used for children aged 2 months and older. Adverse reactions to the oral poliovirus vaccine may include fever, pallor, difficulty breathing, oral mucosal reactions, rash, allergic reactions, and others. A detailed analysis is as follows:

1. Fever: Some children may experience fever after taking the oral polio vaccine, usually a mild fever. No special treatment is required; encourage the child to drink more water, rest adequately, and monitor body temperature changes.

2. Gastrointestinal discomfort: The vaccine may irritate the gastrointestinal mucosa. Common gastrointestinal reactions include nausea, vomiting, and diarrhea. These symptoms are generally mild, with vomiting typically consisting of stomach contents and infrequent episodes of diarrhea.

3. Oral mucosal reaction: The viral components of the vaccine can come into contact with the oral mucosa, potentially causing mild redness, swelling, pain, or blistering of the oral mucosa in some children after administration of the oral polio vaccine.

4. Rash: A small number of children may develop a rash, characterized by scattered red spots or papules typically found on the face, neck, and trunk.

5. Allergic reaction: A very small number of children may be allergic to components of the oral polio vaccine, experiencing allergic reactions such as rash and itching. In severe cases, symptoms may include pallor and difficulty breathing.

It is recommended to follow medical advice when receiving vaccination. After vaccination, parents should closely monitor the child's physical condition. If any abnormalities occur, seek medical attention promptly.