9/13/2023 0 Comments Vaccine side effect pfizerThis result was consistent across age groups, sexes, races, ethnicities, and body weights, as well as those with underlying medical conditions and people who have already had a SARS-CoV-2 infection.Ī large study on the Pfizer vaccine involving about 1.2 million people in Israel supports the findings of clinical trials. There is strong evidence from clinical trials that the Pfizer vaccine has a high level of efficacy.Ī trial involving 43,548 participants, funded by BioNTech and Pfizer, reported that 2 doses of their vaccine confer 95% protection against COVID-19 in people aged 16 years and older. “Effectiveness” refers to its performance in real-world situations. “Efficacy” refers to the vaccine’s performance under ideal and controlled circumstances, such as in clinical trials. When considering the impact of the Pfizer vaccine, it is important to distinguish between its efficacy and its effectiveness. Learn more about getting the COVID-19 vaccination here. have already received another COVID-19 vaccine.are pregnant, planning to become pregnant, or are breastfeeding.
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