Do vaccines cause severe reactions?

Just like any medication, vaccines may cause a reaction in some people. These reactions are usually mild and resolve in a few days. Severe reactions, such as an allergic response, are rare. If you or your child has had a serious allergic reaction to a previous dose of a vaccine, seek urgent emergency treatment.

Do vaccines cause severe reactions?

Just like any medication, vaccines may cause a reaction in some people. These reactions are usually mild and resolve in a few days. Severe reactions, such as an allergic response, are rare. If you or your child has had a serious allergic reaction to a previous dose of a vaccine, seek urgent emergency treatment.