![]() Vaccination works by using a harmless antigen such as an inactivated virus to trigger the immune system to mount an immune response against that specific virus. The main side effects are soreness, headache, fever and muscle ache, which result from the body’s immune response stimulated by the flu vaccine. Mild side effects to the flu vaccine are common and short-lived, as indicated by the CDC. Centers for Disease Control and Prevention (CDC). Instead, dangerous reactions from the flu vaccine are very rare according to the U.S. Posts from numerous social media users reporting serious or life-threatening adverse reactions to the flu shot offer no evidence to support their claims. However, scientific evidence from previous years demonstrates a strong track record of safety for the flu vaccine, contrary to claims that flu shots are dangerous. Given that the flu season just started in the Northern Hemisphere, it is not possible to draw conclusions about the prevalence of mild or serious adverse effects of flu shots in the general population. ![]() Every year, the new vaccines aiming at protecting against the selected virus strains are then produced and tested for efficacy and safety before FDA approval. These recommendations are based on predictions of which types of influenza virus would circulate during the flu season. Every year between February and March, the FDA selects influenza strains to be included in the vaccine, based on recommendations by the World Health Organization and other experts. Food and Drug Administration (FDA) based on safety testing and clinical trials prior to release. ![]() The flu vaccines currently available are licensed by the U.S. Consequently, ensuring the safety of the flu vaccine is crucial to encourage the public to receive vaccines and achieve a vaccine coverage of the population in accordance with the national target of 70%. Furthermore, cases of coinfection with COVID-19 and the flu may produce worse disease outcomes in patients compared to single infections with either the flu or COVID-19. Flu vaccination is particularly important in 2020 because health systems strained from the COVID-19 pandemic might not be able to cope with an additional influx of patients experiencing flu complications. The 2020-2021 flu season starts in October in the Northern Hemisphere, and flu shots are currently being distributed. ![]() For example, some social media users reported developing an abnormally high fever after receiving the flu shot, and others claimed that someone who received a flu vaccine nearly died. Flu vaccination is particularly important this year given the risks of coinfection by the flu and COVID-19.įULL CLAIM: Flu shots lead to severe or life-threatening conditions flu shots are unsafeĬlaims that the flu vaccine for the 2020 – 2021 season caused dangerous side effects started circulating on social media in early October 2020 (see here). Serious adverse reactions to flu shots are very rare and can be associated with allergic reactions to specific ingredients in the vaccine.The benefits provided by the flu vaccine largely outweigh the risks for the population. These side effects result from the intended immune response stimulated by the vaccine. Mild, short-lived side effects from flu shots are common, such as pain at the site of injection, soreness and fever. Flu vaccines are updated each year based on the circulating strain of the virus and undergo clinical trials to ensure their safety. ![]()
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