In this month's Bulletin

1Bull World Health Organ 2010;88:1 | doi:10.2471/BLT.10.000110 In this month’s Bulletin In an editorial, Harry A Lando et al. (2) suggest strategies for reducing the harm that tobacco causes to children. In a second editorial, Venkatraman Chandra-Mouli et al. (3) call for collaboration between sexual and reproductive health and HIV programmes to better respond to the needs of adolescents. Liz Allen (4) discusses the difficulty of measuring the impact of health research, in a third editorial. In an interview, Robert Killick-Kendrick (11–12) discusses ongoing efforts to control the ancient parasitic disease, visceral leishmaniasis. South Africa Breast is always best Lungi Langa (9–10) reports on how new research has changed breastfeeding guidelines for HIV-positive mothers. Change needed for hepatitis B vaccines? C John Clements et al. (66–73) explore the impact of antiviral treatment on circulating strains of hepatitis B. Mapping preterm birth rates Stacy Beck et al. (31–38) analyse worldwide preterm birth rates. Malnutrition and mortality Linda Vesel et al. (39–48) assess the relationship between infant malnutrition, breastfeeding and neonatal mortality. Mixed health systems syndrome Sania Nishtar (74–75) discusses the typical problems of health systems with a public–private service mix. Spain Hydatid disease costs millions Christine Benner et al. (49–57) estimate the economic losses caused by human and animal hydatid disease. Senegal Water woes in holy city Felicity Thompson (7–8) reports on the annual pilgrimage that overwhelms Touba’s fragile water and sanitation system. Viet Nam Mortality statistics are vital Chalapati Rao et al. (58–65) suggest ways to improve the civil registration system to obtain more accurate mortality statistics. Multiple types of abuse and mental health Huong Thanh Nguyen et al. (22–30) examine the impact of maltreatment during childhood on adolescent mental health. Zimbabwe Tuberculosis screenings Elizabeth L Corbett et al. (13–21) evaluate different approaches to screening for tuberculosis, especially in HIV-positive individuals. China Health reform targets vulnerable Cui Weiyuan (5–6) reports on how China is extending coverage to migrant workers as part of its new health reform.