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A vaccine-associated sarcoma (VAS) or feline injection-site sarcoma (FISS) is a type of malignant tumor found in cats (and, often, dogs and ferrets) which has been linked to certain vaccines. VAS has become a concern for veterinarians and cat owners alike and has resulted in changes in recommended vaccine protocols.
VAERS is a postmarketing surveillance program, collecting information about adverse events (possible harmful side effects) that occur after administration of vaccines to ascertain whether the risk–benefit ratio is high enough to justify continued use of any particular vaccine.
According to the U.S. Centers for Disease Control and Prevention, while "any vaccine can cause side effects", [11] most side effects are minor, primarily including sore arms or a mild fever. [11] Unlike most medical interventions vaccines are given to healthy people, where the risk of side effects is not as easily outweighed by the benefit of ...
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 updated COVID-19 vaccine is now available. Infectious disease doctors recommend being smart about the timing of your shot. You can expect similar side effects to the previous vaccines if you ...
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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]
Regulators in London said people who have a "significant history" of allergic reactions shouldn’t receive the new Pfizer-BioNTech vaccine while they investigate two adverse reactions that ...