Covid-19 cases are rising again.
There are more variants as the virus mutates and develops as it spreads.
That presents challenges to scientists developing vaccines to cope with the new threats.
The World Health Organization says it wants its experts to return to China to find out more about the origins of the disease.
So how much of a danger is this latest wave?

Presenter: Mohammed Jamjoom

Guests:
Dr. Paul Hunter, Professor in Medicine, University of East Anglia.

Dr. Patrick Tang, Division Chief of Microbiology at Sidra Medicine, Doha.

Dr. Gabriel Scally, Professor of Public Health, Bristol University.

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