The most common reactions are fever and fussiness for 2 – 3 days. Redness, swelling, and pain at the site of injection are also common. You can treat this with ice or infant Tylenol drop. These reactions are most likely to occur after DTaP. Sometimes a small harmless nodule may be felt at the injection site that will disappear after several weeks.

Please notify your PD if your child had an unusually severe reaction such as fevers higher than 101, high-pitched and prolonged crying or any other unexpected reaction. This may be an indication not to continue with that particular vaccine.