Will a vaccine or recovery from the virus give us long-term immunity to Covid-19?

New evidence on how our bodies combat the virus has huge implications for the development of a coronavirus vaccine

This episode first aired on Today in Focus, the Guardian's global daily news podcast.

It's a familiar refrain of the past six months: When will we get back to normal?" The premise is that once a vaccine arrives or enough people have had Covid-19 we will be immune from its terrible effects. But new evidence on how our bodies combat the virus is casting doubt on the prospects for long-term immunity.