![]() In children, side effects from the nasal spray may include: The nasal spray: The viruses in the nasal spray vaccine are weakened and do not cause severe symptoms often associated with influenza illness. Soreness, redness, and/or swelling where the shot was given Some minor side effects that may occur are: These side effects are mild and short-lasting, especially when compared to symptoms of a bad case of flu.Ī flu shot: The viruses in a flu shot are killed (inactivated), so you cannot get flu from a flu shot. While a flu vaccine cannot give you flu illness, there are different side effects that may be associated with getting a flu shot or a nasal spray flu vaccine. What side effects can occur after getting a flu vaccine? The viruses cannot infect the lungs or other areas where warmer temperatures exist. The weakened viruses are cold-adapted, which means they are designed to only cause infection at the cooler temperatures found within the nose. The nasal spray vaccine is made with attenuated (weakened) live flu viruses, and also cannot cause flu illness. Flu vaccines that are administered with a needle (flu shots) are currently made in two ways: the vaccine is made either with a) flu vaccine viruses that have been killed (inactivated) and are therefore not infectious, or b) with proteins from a flu vaccine virus instead of flu vaccine viruses (which is the case for recombinant influenza vaccine). No, a flu vaccine cannot cause flu illness. If you have questions about your specific medical conditions, call your doctor to ask if it’s safe for you to get a flu vaccine. People who should not receive flu vaccines are those who have had a severe allergic reaction to the flu or other vaccine in the past and those who have had a condition called Guillan-Barre syndrome. The flu vaccine is safe for most people and is recommended for everyone ages 6 months and older.
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