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Next crop of COVID-19 vaccine developers take more traditional route

Small bottles labelled with "Vaccine" stickers stand near a medical syringe in front of displayed "Coronavirus COVID-19" words in this illustration. [Reuters]

The handful of drugmakers dominating the global coronavirus vaccine race are pushing the boundaries of vaccine technology. The next crop under development feature more conventional, proven designs.

The world will need several different vaccines to fight the COVID-19 pandemic, given the sheer size of global need, variations in effects on different populations, and possible limits of effectiveness in the first crop.

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Coronavirus vaccine