Symptoms may stop after a few seconds or several minutes.

Some more information on Childhood Seizures and Vaccines:

Sometimes, fevers can cause a person to experience spasms or jerky movements called seizures. These seizures related to fever are called febrile seizures.

Febrile seizures can happen with any condition that causes a fever. Causes include common childhood illnesses like colds, the flu, an ear infection, or roseola. Vaccines sometimes cause fevers, but febrile seizures are rare after vaccination.

Up to 5% of young children will have at least one febrile seizure, usually associated with getting sick. Most febrile seizures happen in children between the ages of 6 months and 5 years. The most common age range to have a febrile seizure is 14–18 months. The recommended age for the first doses of MMRV, MMR, and varicella vaccines is 12-14 months old. During this time children in this age group are recommended to receive other routine vaccines as well.

During a febrile seizure, a child often has spasms or jerking movements and may lose consciousness. Febrile seizures usually last one or two minutes, and they do not cause any permanent neurological damage. They are most common with fevers of 102°F (38.9°C) or higher, but they can also happen at lower body temperatures or when a fever is going down.

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