More than two years after the emergence of Covid, infection levels are high once again. The Office for National Statistics estimates that 2.7 million people, or 1 in 25 of us, have got Coronavirus.

There’s concern too about new Omicron variants BA.4 and BA.5 – mutations which help the virus re-infect our bodies.

But how worried should we actually be this time? Are the mutations normal or an alarming new development? And how much of a threat does Coronavirus still face to the NHS?

Joining David Aaronovitch in The Briefing Room are:

James Gallagher, BBC Health and Science Correspondent

Producers: Tim Mansel, Kirsteen Knight and Simon Watts. Editor: Richard Vadon. Studio Manager: Rod Farquhar Production co-ordinators: Siobhan Reed & Helena Warwick-Cross