Encephalitis is a reaction in children and adults causing swelling in the brain. The majority of vaccine-related injuries result from the immune system turning against its own tissues and causing brain inflammation. This is considered secondary encephalitis.
What vaccine causes it?
The National Vaccine Injury Compensation Program (VICP) identifies encephalitis as a possible injury due to the following vaccines:
- Pertussis antigen-containing vaccines (DTaP, Tdap, DTP, P, DTP-Hib)
- Measles virus-containing vaccines (MMR, MR, M)
- Measles, mumps, and rubella virus-containing vaccines (MMR)
- Rubella virus-containing vaccines (MMR, MR, R)
What are the symptoms?
Bacteria, viruses, other microorganisms, and vaccines can trigger swelling in the brain and lead to symptoms including:
- Difficulty talking, hearing, or moving
- Intense headaches, fevers, and fatigue
- Paralysis or loss of consciousness
- Seizures, disorientation, and confusion
When do the symptoms appear?
Symptoms often occur within a few days of the vaccination.
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