Omicron and its sub-variants have been dominating new surges of SARS-CoV-2 infections around the world and were behind South Africa’s fifth wave. The BA.4 and BA.5 sub-lineages unveiled yet more surprises about the evasive nature of these ever-emerging forms of SARS-CoV-2. They also hold clues for what to expect next and how to prepare. Aisha Abdool Karim reports.
Just 54% of people in South Africa over the age of 50 have received at least one COVID-19 jab, with significant variation between provinces, as experts warn of the possibility of another wave of COVID-19 in future. Chris Bateman reports.