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One in four people experience mild side effects from Covishield COVID-19 vaccine: Lancet study

The study also reports a significant decrease of infection rates from 12 to 21 days after the first dose of the Pfizer (58 percent reduction) and AstraZeneca (39 percent reduction) vaccines compared to a control group. The drop in infection at least 21 days after the first dose for Pfizer is 69 percent and for AstraZeneca 60 percent, according to the study.

April 28, 2021 / 04:36 PM IST

One in four people experience mild, short lived systemic side effects after receiving either the COVID-19 preventive by Pfizer or AstraZeneca vaccine -- known as Covishield in India -- with headache, fatigue and tenderness the most common symptoms, according to a study published in the Lancet Infectious Diseases journal.

The researchers from King's College London in the UK also found that most systemic side effects -- meaning side effects excluding where the injection took place -- peaked within the first 24 hours following vaccination and usually lasted 1-2 days.

The analysis of data from the ZOE COVID Symptom Study app found much fewer side effects in the general population with both the Pfizer and AstraZeneca vaccines than reported in trials.

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