Coronavirus: Conversation with volunteers for vaccine trials

We speak to two people, who have volunteered to test a Covid-19 vaccine. One has already been injected with a vaccine in the US, and the other one has had a screening in the UK.

We also continue to answer questions on the coronavirus pandemic, using the help of the BBC's health team, doctors and scientists. We've had questions in from all around the world.

If you'd like to send us a message on WhatsApp, you can use this number: +447730 751925. Twitter: @BBCOS.

(Photo: A Polish medical staff works at a drive-thru COVID-19 testing lab in Warsaw. Credit: LESZEK SZYMANSKI/EPA)