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by simfree
1579 days ago
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The flu vaccine (and other vaccines) only stimulate an IgG reaction (the immune cells that protect most of your body excluding your upper respiratory tract). Getting the flu or any other disease your vaccinated against in your upper respiratory tract has always been a risk, but IgA cells usually knock this out of your upper respiratory tract in 1 to 3 days for viral infections, and you avoid getting an infection in the lungs which could cause pneumonia. |
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