Is UK at start of new Covid wave driven by BA.4 and BA.5 subvariants?

Virus may be evolving to refavour infecting lung tissue. We assess what this could mean for the course of the pandemic

If you thought Covid-19 was dead and gone, think again. Early signs indicate that the UK may be at the start of a new wave of Covid infections driven by BA.4 and BA.5 - while new data suggests these variants may have evolved to refavour infecting lung tissue, which could make them more dangerous.

So what can we expect in the coming weeks and months?