The science behind Covid-19 vaccine boosters: Do we really need an extra shot?

It was only earlier this year that “Have you been vaccinated?” became the standard greeting in many countries. Now, that is set to be taken over by: “Have you got your booster shot?” Some countries, including Singapore, Israel, Germany and France, have started administering an additional dose of a Covid-19 vaccine to the elderly and the immunocompromised, as studies show waning […]

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