Shift in circulating strains means those who’ve already had vomiting bug this winter risk catching it again

The UK could be facing a second wave of the winter vomiting bug, norovirus, the UK Health Security Agency has warned.

The latest figures show a rise in norovirus across the UK, with reported cases at the highest level in more than a decade. A shift in circulating strains means that those who have already been ill with norovirus this winter are at risk of catching it again.