Implementation research: reactive mass vaccination with single-dose oral cholera vaccine, Zambia.

OBJECTIVE: To describe the implementation and feasibility of an innovative mass vaccination strategy - based on single-dose oral cholera vaccine - to curb a cholera epidemic in a large urban setting. METHOD: In April 2016, in the early stages of a cholera outbreak in Lusaka, Zambia, the health ministry collaborated with Médecins Sans Frontières and the World Health Organization in organizing a mass vaccination campaign, based on single-dose oral cholera vaccine. Over a period of 17 days, partners mobilized 1700 health ministry staff and community volunteers for community sensitization, social mobilization and vaccination activities in 10 townships. On each day, doses of vaccine were delivered to vaccination sites and administrative coverage was estimated. FINDINGS: Overall, vaccination teams administered 424 100 doses of vaccine to an estimated target population of 578 043, resulting in an estimated administrative coverage of 73.4%. After the campaign, few cholera cases were reported and there was no evidence of the disease spreading within the vaccinated areas. The total cost of the campaign - 2.31 United States dollars (US$) per dose - included the relatively low cost of local delivery - US$ 0.41 per dose. CONCLUSION: We found that an early and large-scale targeted reactive campaign using a single-dose oral vaccine, organized in response to a cholera epidemic within a large city, to be feasible and appeared effective. While cholera vaccines remain in short supply, the maximization of the number of vaccines in response to a cholera epidemic, by the use of just one dose per member of an at-risk community, should be considered.

Social determinants of HIV/AIDS and sexually transmitted diseases among black women: implications for health equity.

Recent epidemiologic reports show that black women are at risk for HIV infection and other sexually transmitted diseases (STDs). In this report, we go beyond race and consider a number of social and economic trends that have changed the way many black women experience life. We discuss poverty, loss of status and support linked to declining marriage participation, and female-headed single-parent household structure-all of which influence sexual risks. We also discuss the Centers for Disease Control and Prevention-led national efforts to advance consideration of social determinants of health (SDH) and promotion of health equity in public health activities that may have impact on black and other women.