The level of research and investment poured into Covid-19 should also be applied to other deadly, infectious disease killers, such as TB, say SA experts.
Many countries, including SA, are offering booster shots to parts of the population. We take a look at what the data say about their safety and who needs them most.
Past infection is unlikely to provide protection against reinfection with Omicron – but will this immunity, and that from vaccines, protect against severe disease?