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Pfizer/BioNTech’s COVID-19 Vaccine Causes Adverse Reactions in Over Half of Clinical Trial Participants

Clinical results for COVID-19 vaccine candidates are beginning to trickle in and, so far, Pfizer/BioNTech are reporting adverse reactions in more than half the participants. The trial is extremely small — 45 volunteers — and includes only healthy adults aged 18 to 55. Varying levels of pain, fever and sleep disturbances were reported, with two of the 45 reporting Grade 3 reactions. The U.S. Department of Health and Human Services describes Grade 3 actions as “severe or...