Three articles published by the Associated Press in mid-December criticising the conduct of a trial of the antiretroviral drug nevirapine in Uganda are threatening to undermine its use in newborn babies in developing countries, according to South African experts. A single dose of the drug given to mothers while in labour and to their babies at the time of birth is known to greatly reduce transmission of HIV from mother to child. The articles, which appeared in newspapers and were broadcast on radio stations in the United States, Britain, South Africa, and many other countries, made allegations about a trial that was conducted from 1997 to 1999 in Uganda by researchers from Johns Hopkins University and Makerere University in Kampala, Uganda, and subsequently published.