Rubella virus circulates all over South Africa. The number of cases usually increases in late winter and early spring. When there are several cases of rubella in a community over a short period of time, a rubella outbreak is said to occur. There are frequent outbreaks in day care centers, schools, and tertiary education institutions.

What is rubella?

https://www.nicd.ac.za/increase-in-rubella-cases-in-the-western-cape-province-17-october-2023/