Baby Nyasha, 8 months old, in the Prevention of Mother to Child Transmission program at MSF's Overspill clinic in Epworth, Zimbabwe. The program is an important step in stemming the transmission of the virus from pregnant mothers to children. With 14.3 per cent prevalence rate (UNAIDS 2009), Zimbabwe is one of the countries worst affected by the worldwide HIV/AIDS epidemic. Since 2007, MSF has been running an HIV/AIDS project in Epworth. In August 2011, MSF had 12,864 patients under care in both of its clinics there.