When will the top Covid-19 vaccines become available?
Encouraging results on Covid-19 vaccine trials by frontrunners in November have raised hopes that the first generation of coronavirus antidotes is likely to receive approval as soon as December end or early 2021. Ongoing late-stage human trials of mRNA vaccine candidates developed by Pfizer-BioNTech and Moderna Inc have pointed to efficacy rates as high as 95 per cent.
Russia has also claimed a 92 per cent effectiveness for its Sputnik V vaccine candidate, which is being tested on humans in mid- to late-stage trials by Hyderabad-based Dr Reddy’s Laboratories in India. Of

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