In an Ask The Agenda special, we share video questions from viewers around the globe and put them to Dr Margaret Harris from the World Health Organization and Prof Karol Sikora of the University of Buckingham's medical school.

Questions include whether COVID-19 can infect people more than once, if the virus can mutate and whether a vaccine, once it is found, should be made compulsory.

Dr Harris and Professor Sikora also answer viewers questions on the future of air travel, the environmental issues which may have caused the pandemic, and what the long term effects would be if America were to follow through with plans to stop funding the World Health Organisation.