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These are called egg-adapted changes that lead to differences in genes and structures between the candidate viruses in the eggs and the circulating, 'wild' viruses. As a result, less effective antibodies are made by the immune system of humans. Hence, egg-based vaccines may have lower efficacy in flu prevention. [7]
In some people, a flu vaccine may cause serious side effects, including an allergic reaction, but this is rare. Furthermore, the common side effects and risks are mild and temporary when compared to the risks and severe health effects of the annual influenza epidemic. [77]
Doctors explain flu shot side effects, from arm soreness to fatigue. Plus, how to feel better if you feel sick post vaccine and severe reactions to be aware of. 11 Totally Normal Side Effects of ...
How to treat flu show side effects. Again, most people who have flu shot side effects only have a sore arm, if that. But some people will have things like muscle aches, headache, or flu-like symptoms.
For the egg-based technology, the flu virus is grown inside an egg. [23] On the other hand, the flu virus strand for cell-based vaccine is grown using cultured cell of mammalian origins. [23] As there are insufficient supply of H1N1 vaccine dutring the 2009 pandemic, new technologies, not restricted by the egg-based or cell-based, are tested. [9]
A high-dose vaccine (Fluzone High-Dose) four times the strength of standard flu vaccine was approved by the FDA in 2009. [22] [23] [24] This vaccine is intended for people 65 and over, who typically have weakened immune response due to normal aging. The vaccine produces a greater immune response than standard vaccine.
But you might have some short-lived symptoms for a few days after the shot, since it has rallied your immune system to attack if a flu virus does actually invade. Common flu shot side effects include:
The flu shot and COVID-19 shot each come with their own potential side effects. Here’s what you may experience in terms of side effects when you get the flu shot: Soreness, redness, and swelling ...
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