An administrative error in the processing of this article by Michael W Adler (19 May, pp 1226-9) led to data for 1999 being reported instead of data for 2000. The first paragraph in the subsection “Worldwide” (p 1227) should have reported that by the end of 2000 there were 36.1 million people (34.7 million adults and 1.4 million children aged <15 years) living with HIV/AIDS and that during 2000 there were 5.3 million new infections (16 000 a day). In the next subsection (“USA, UK, and Europe,” p 1228) the second paragraph should have reported that there were 236 406 adult cases in Europe by June 2000 and 17 151 in the United Kingdom by December 2000. In the table showing adult patient groups (p 1228) the numbers of patients in the United Kingdom should read (downwards): 11 345, 1095, 307, 828, 3391, 185 (with the row titled “Mother to infant” completely deleted); the total should therefore be 17 151, and the percentage in the fifth row should be 20 [not 18]. The total number of males and females given in the figure on p 1229 should be 35 626 and 8106 respectively, and the caption should state that these are data to December 2000. In addition, in the last box on p 1226 “Mycobacterial tuberculosis should be qualified by “at any site,” and the final sentence of the article should talk about developing a control strategy [not a strategy or control].