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A team of WHO scientists have reportedly recommended a third dose of a coronavirus vaccine. The U-turn comes after months of top WHO officials calling on nations not to stockpile their vaccine supplies for booster programmes. The WHO’s SAGE group has met last week to discuss additional vaccines to people in two categories.

The first group includes people who are immunocompromised, whose natural defences against pathogens are weakened, “no matter which vaccine they received”.

According to molecular biologist and science journalist Kai Kupferschmidt, the second group includes people above the age of 60 who havd received the Sinopharm or Sinovac vaccine.

The call for booster shots is supposedly based on Covid data collected in Latin America, where two vaccines have been extensively used.

Mr Kupferschmidt tweeted: “In both cases @WHO considers the additional dose to be part of the primary immunization series, so separate from the discussion about booster shots to shore up waning immunity.”

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