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The Corona Vaccine Race: How Close Are We To A Covid-19 Vaccine?

Researchers around the world are racing to develop a vaccine against Covid-19, with more than 140 candidate vaccines now tracked by the World Health Organization. But how close are we to a vaccine?

Researchers around the world are racing to develop a vaccine against Covid-19, with more than 140 candidate vaccines now tracked by the World Health Organization. But how close are we to a vaccine?