Is it normal to have a fever and diarrhea after getting a vaccine?

Patient's question:

Diarrhea began with intermittent high fever the night before yesterday, accompanied by diarrhea. The possible cause could be the measles vaccination given to the child the night before yesterday. Previous treatment and effectiveness: Only some Houtong infant cold powder and montmorillonite were given, yesterday...

Doctor's answer:

High fever, diarrhea—this is definitely not normal. Generally, after receiving the measles vaccine, there might be a slight low-grade fever, but it would never reach above 38°C again. Your child's condition appears to be a second-degree viral fever with nausea and vomiting.
Recommendations for treatment:
1. Antiviral treatment: Use Xiyaping + Ribavirin for antiviral therapy.
2. Oral Montmorillonite clay to stop diarrhea.
3. Momella and Multi-enzyme tablets to regulate the gut. During nausea and vomiting, feed the baby unsweetened formula. Once the child recovers, switch to sweetened formula or breastfeeding.
4. If the diarrhea is severe, seek hospital treatment for fluid replacement.
5. Since you have already taken antiviral medication, the vaccine you received is no longer effective, as the measles vaccine is a weakened virus. Once your child recovers and the fever subsides, you can get another vaccination at the prevention station.

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