Despite a relatively slow start, South Africa can speed up its implementation of the SDGs.
Remarkable progress is being made on HIV treatment. But African countries need to work on sustainable ways to ensure the treatment programmes are not entirely dependent on foreign aid.
Three new HIV vaccine concepts which rely on high-tech designer proteins are being trialled to see if they can stop the virus.
Understanding where there are high numbers of new HIV infections is important to establishing whether interventions are working or not.