Coronavirus live news: WHO reports worrying infection trends in southern Europe and BalkansJuly 22, 2020
WHO says Americas remain global hotspot but cases accelerating in southern Europe, Balkans and Africa; Trump urges people to wear masks
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As the coronavirus spreads around the world, there are concerns that it will mutate into a form that is more transmissible, more dangerous or both, potentially making the global health crisis even worse.
What do we know about the way the virus is evolving?
Related: Will Covid-19 mutate into a more dangerous virus?
The US federal government has signed a contract with Pfizer for 100 million doses of coronavirus vaccine, once it is approved.
The health and human services secretary, Alex Azar, said on Fox News:
We just signed a contract with global pharmaceutical leader Pfizer to produce 100 million doses of vaccine starting in December of this year with an option to buy a half a billion doses.
Now those would of course have to be safe and effective.