Why do you get a reaction to a vaccine?

When a person receives a shot, a flurry of white blood cells called macrophages and neutrophils arrive at the injection site and begin producing chemicals called cytokines. This response triggers a wide range of symptoms, from inflammation and swelling at the injection site to fever, fatigue, and chills.

Which vaccine may cause epileptic seizures?

BACKGROUND: The administration of the diphtheria and tetanus toxoids and whole-cell pertussis (DTP) vaccine and measles, mumps, and rubella (MMR) vaccine has been associated with adverse neurologic events, including seizures.

Do vaccinations cause febrile seizures?

“It is known that some vaccines are associated with an increased rate of febrile seizure at a time when there is a fever peak after vaccination. For example, five to 12 days after a measles-containing vaccine or in the first two days after some influenza vaccines when given together with pneumococcal vaccines.”

Are seizures a contraindication for vaccines?

A personal or family history of seizures is a precaution for MMRV vaccination; this is because a recent study found an increased risk for febrile seizures in children 12-23 months who receive MMRV compared with MMR and varicella vaccine (36).

Why is there no reaction to vaccines?

Why might there not be a reaction? It’s not entirely clear why some people experience side effects and others don’t. It’s likely related to variations in the immune system and its response, which may be influenced by things like age, genetics or underlying medical conditions.

What does local reaction mean?

When a reaction stays with one area of the body, it’s known as a localized reaction. When inflammation spreads from a localized area of one organ (like the skin) to other organ systems in the body, it’s known as a systemic reaction.

Can flu shot cause seizures in epilepsy?

Epileptic seizures are not a side effect of the flu vaccine. Concerns have been raised about flu vaccines increasing the risk of febrile seizures (usually harmless seizures that are related to high fevers) in young children. If you have concerns about vaccination and febrile seizures, talk with your pediatrician.

What is the clonic phase of a seizure?

Clonic means sustained rhythmical jerking. During a clonic seizure, jerking of the body or parts of the body are the main symptom. They can begin in one area (called focal motor) or affect both sides of the brain (called generalized clonic). Clonic seizure movements cannot be stopped by restraining the person.

Can the polio vaccine cause seizures?

Be sure to tell your child’s doctor about any serious side effects that occur after your child receives the vaccine. This may include seizures, a high fever, crying that will not stop, or severe redness or swelling where the shot was given.

Can vaccines lead to seizures?

Studies have shown a small increased risk for febrile seizures during the 5 to 12 days after a child has received their first vaccination with the measles, mumps, rubella (MMR) vaccine. The risk is slightly higher with the measles, mumps, rubella, varicella (MMRV) combination vaccine, but the risk is still small.

What are the contraindication of the Tdap vaccine?

Contraindications and Precautions You should not administer diphtheria, tetanus, and pertussis vaccines to: Patients who have had a severe allergic reaction (e.g., anaphylaxis) after a previous dose. A person who has a severe allergy to any vaccine component.