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Study reveals extent of Covid vaccine side effects


About one in three people recently given a Covid vaccine by the NHS report some side-effects.

None was serious - a common one was some soreness around the injection site, the UK researchers who gathered the feedback found.

Experts say the findings, from about 40,000 people - mostly healthcare workers - are reassuring for the millions having the vaccines now.

The Zoe app team from King's College London found:

  • 37% experienced some local "after-effects", such as pain or swelling near the site of the injection, after their first dose, rising to about 45% of the 10,000 who had received two doses
  • 14% had at least one whole-body (systemic) after-effect - such as fever, aches or chills - within seven days of the first dose, rising to about 22% after the second dose

These after-effects get better within a few days. All of the medical trials and real-world experiences so far suggest the vaccines are safe and effective.

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Source: BBC News, 4 February 2021

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