• Our piece on the work of Dora Colebrook and Leonard Colebrook on streptococcal infections appeared with a photo of someone else (4 February, p 40). See the online version (bit.ly/Colebrook).
• Matthew Hodson of UK charity NAM told us that studies of couples in monogamous relationships, in which one partner is HIV-negative and the other positive and on treatment, mean: “When we are undetectable, we are uninfectious. This means that pretty much all the fear that HIV-negative people have of those of us living with HIV is just wasted energy” (11 February, p 22).
• Oh caption! My caption! The first written language emerged some 5400 years ago, as the main text of the article stated (11 February, p 34).
