Covid-19 vaccines being redesigned to tackle new variants

Changes or mutations in the virus should not make vaccines completely ineffective, said the WHO in a recent article on new variants.
Changes or mutations in the virus should not make vaccines completely ineffective, said the WHO in a recent article on new variants.PHOTO: REUTERS

SINGAPORE - Barely three months after the front-runner Pfizer-BioNTech Covid-19 vaccine was rolled out in a mass vaccination campaign in Britain, some vaccine developers are already redesigning their vaccines to tackle new variants.

Last week, United States biotechnology firm Moderna announced that it had dosed the first participant in a trial evaluating a booster vaccine it designed to target a new variant of the virus first identified in South Africa.

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