Methods
Study design
A cross-sectional survey was conducted from June-December 2010 among mother/caregiver-infant pairs visiting the immunisation service points of randomly selected public primary health care facilities (PHCs) and community health centres (CHCs) across the nine provinces of South Africa. The protocol and overall transmission rate findings have been published elsewhere.[8]
At the time of the study guidelines in South Africa recommended that mothers be offered Zidovudine (AZT) from 28 weeks gestation and single dose nevirapine (sdNVP) at labour or triple (combination) antiretroviral therapy (cART) if CD4 cell count was ≤200 cells/mm3. Infants were offered sdNVP at birth and 7–28 days of postpartum AZT.[16]
Sample size and Sampling