Will the government act quickly enough to protect the most vulnerable from the third wave of COVID-19?

The populations most at risk of severe COVID-19, older and vaccinated early, may need to receive a booster jab earlier than expected because their protection is waning significantly against vaccine-resistant Delta variant.

Just six months ago, Margaret Keenan, 91, became the first person in Britain to receive a first dose of the Pfizer coronavirus vaccin…

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