COVID vaccines: why second boosters are being offered to vulnerable people in the UK – but not young and healthy people yet

nednapa/Shutterstock Until recently, the UK government limited a fourth dose of the COVID vaccine to people with severely weakened immune systems over the age of 16. But, following a resurgence of COVID cases in the UK, the government has followed some other countries such as Israel, Germany and Sweden, andContinue Reading

Omicron XE is spreading in the UK – a virologist explains what we know about this hybrid variant

Andrii Vodolazhskyi/Shutterstock As the COVID pandemic has progressed, we’ve repeatedly seen the arrival of new viral variants. Variants of concern, such as delta and omicron, are versions of SARS-CoV-2 (the virus that causes COVID-19) which have acquired mutations. These mutations can provide SARS-CoV-2 with a genetic advantage – so forContinue Reading