EU says mRNA vaccine booster may be given to those with weak immunity

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(Reuters) – The EU drug regulator said on Monday people with a severely weakened immune system may be given a third dose of COVID-19 vaccines made by Pfizer (NYSE:PFE) and Moderna (NASDAQ:MRNA) at least 28 days after their second dose.

The long-awaited guidance comes after several EU member states launched their own booster campaigns, with a repeat shot given about six months after an initial two-dose course, although countries have come to widely different conclusions on who is eligible.