Beta

South Africa scientists: Omicron triples Covid infections

Omicron variant is three times more likely to cause reinfections compared to the Delta or Beta strains, scientists say in a preliminary study.

What is a Covid-19 vaccine 'breakthrough' case?

Covid-19 vaccines work by teaching the body to recognise the virus. So if you’re exposed to it after vaccination, your immune system should be ready to spring into action and fight it but there is a chance of getting infected.

Covid-19 variants named after Greek letters to curb stigmatising countries

WHO renames four coronavirus variants known generally as UK, South Africa, Brazil and India variants as Alpha, Beta, Gamma, Delta after other nomenclatures, such as Greek gods and bird names, were rejected.