Scientists around the globe are racing to develop a vaccine against Covid-19, with more than 140 candidate vaccines now tracked by the World Health Organization.
Of these, some few have entered clinical trials. Among these are two vaccines made by US drug companies Moderna and Pfizer.
Scientists are hoping to develop a coronavirus vaccine within 12 to 18 months, although vaccines normally require years of testing and additional time to produce at scale.
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from : www.newtimes.co.rw