Facing COVID-19 variants, vaccine makers are weighing how to tweak their designs ...Middle East

Virologists and public health researchers are continuing to identify new variants of the SARS-CoV-2 virus, which causes COVID-19. Vaccine makers need to keep a close watch on these variants to ensure their vaccines still work against the new variants. (Pixabay/)Click here to see all of PopSci’s COVID-19 coverage. Scientists began working on vaccines against COVID-19 just over a year ago. But in that short span of time (unprecedented for vaccine development), a handful of vaccines have been authorized for use around the world and more than 170 million shots have now been delivered across since December alone. That number has already eclipsed the total number of recorded COVID-19 cases since t

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Facing COVID-19 variants, vaccine makers are weighing how to tweak their designs ...Middle East

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