Are we near to having a vaccine for Covid-19?

Even a once bullish PM is now not so optimistic but there are promising signs of a vaccine on the horizon

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In March, Boris Johnson said we would turn the tide in 12 weeks and send the coronavirus packing" and by May ministers were boasting of having a vaccine by September. Last week the prime minister sounded far less confident, telling MPs that there was still no vaccine for SARS, 18 years after it emerged. A vaccine may not be far away though.