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[58] [59] Reports of serious side effects, such as allergic reactions, remain very rare [a] with no long-term complications documented. [ 2 ] [ 61 ] The vaccine is the first COVID‑19 vaccine to be authorized by a stringent regulatory authority for emergency use [ 62 ] [ 63 ] and the first to be approved for regular use. [ 43 ]
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Common side effects of the vaccine listed by Pfizer-BioNTech and Moderna include those you may have when you are sick, like tiredness, headache, muscle and joint pains, chills, fever, nausea ...
Potential side effects of the 2023 vaccine: This fall’s updated COVID vaccine is new, but it does not produce new, unknown or harsher side effects. “I get that people might be worried about ...
The terms "intrinsic incubation period" and "extrinsic incubation period" are used in vector-borne diseases. The intrinsic incubation period is the time taken by an organism to complete its development in the definitive host. The extrinsic incubation period is the time taken by an organism to develop in the intermediate host. [citation needed]
The vaccine's longevity and continuous protection are under study, with ongoing research focusing on its duration of effectiveness, which remains partially undetermined as of the latest updates. The safety profile of the vaccine is favorable, with common side effects including injection site pain, fatigue, and headaches.
Myocarditis after receiving a Covid vaccine is rare. Pfizer and Moderna are researching possible long-term risks for those who recovered from heart problems after vaccination.
[11] [12] Safety, efficacy, and clinical endpoints may vary, including the definition of side effects, infection or amount of transmission, and whether the vaccine prevents moderate or severe infection. [13] [14] [15] A clinical trial design in progress may adopt an "adaptive design". If accumulating data provide insights about the treatment ...