Randeep Guleria, director of All India Institute of Medical Sciences (AIIMS)-Delhi, on Sunday said the current vaccines against Covid-19 could be tweaked to offer protection against newer variants of the contagion.source https://timesofindia.indiatimes.com/india/can-tweak-existing-covid-vaccines-to-fight-new-strains-guleria/articleshow/88379743.cms
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