Here is what is known about the new Covid NB.1.8.1 variant from cases in the UK, symptoms, what the World Health Organisation has said and more.

A new strain of the SARS-CoV-2 virus that seems better adapted to infect people is fuelling a fresh wave of covid-19 sweeping through Asia and the Middle East and is increasingly showing up in the UK.

COVID-19 is remains a public health concern five years after the start of the pandemic. What to know about vaccines, variants ...