Hong H, Malfeld S, Smit S, Makhathini L, Fortuin M, Motsamai T, et al. A retrospective 5-year review of rubella in South Africa prior to the introduction of a rubella-containing vaccine. PLoS One. 2022;17(5):e0265870. https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0265870&type=printable