We can't be certain the coronavirus vaccines will stop the pandemic

A volunteer in Moscow takes part in the trial for the Sputnik V vaccine

Natalia Kolesnikova/Afp Via Getty Images

IT IS the ultimate exit strategy from . A safe and effective vaccine is of “critical importance to world health”, the World Health Organization (WHO) has said.

Vaccine developers are working flat out to make good on that. Last week, the US pharmaceutical giant Pfizer and its German partner BioNTech from their ongoing phase III trial, the last stage of testing whether a potential vaccine is safe and effective. The interim results showed a headline success …

By winband

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