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In the original clinical trials for Pfizer-BioNTech's COVID-19 vaccine, for example, less than half of study participants reported side effects, but the shot worked well for the vast majority of ...
It you have flu shot side effects at all, they will likely start eight to 12 hours after your shot, says Thomas Russo, M.D., professor and chief of infectious disease at the University at Buffalo ...
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 ...
The influenza vaccine won't give you the flu. However, flu shot side effects do include sore muscles, fatigue and fever. ... are due in part to your body’s immune system reacting to the vaccine ...
According to a 2016 study by faculty at the University of New South Wales, getting a flu shot was as effective or better at preventing a heart attack than even quitting smoking. [106] A 2024 CDC study found that the 2024 flu vaccine reduced the risk of hospitalization from the flu by 35% in the Southern Hemisphere. [107]
Due to the geographic distribution of pneumococcal serotypes, additional research is needed to find the most efficacious vaccine for developing-world populations. In a previous study, the most common pneumococcal serotypes or groups from developed countries were found to be, in descending order, 14, 6, 19, 18, 9, 23, 7, 4, 1, and 15.
The most common side of the flu shot is a sore arm, but some people also can experience some mild side effects like mild fever and fatigue, but these resolve in a day or two.”
The most common adverse reactions (reported in more than 10% of subjects vaccinated with pneumococcal polysaccharide vaccine in clinical trials) were: pain, soreness or tenderness at the site of injection (60.0%), injection-site swelling or temporary thickening or hardening of the skin (20.3%), headache (17.6%), injection-site redness (16.4%), weakness and fatigue (13.2%), and muscle pain (11.9%).