Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Researchers are enrolling thousands of participants around the world in clinical trials in a massive effort to test whether a once-daily pill can prevent HIV. Cassandra Willyard explores why they are optimistic the strategy will work and why it might be difficult to implement.
Last month, Michel Sidibé assumed his new role as executive director of UNAIDS, the United Nations agency created more than a decade ago to foster global leadership in the response to the AIDS pandemic. Sidibé discussed his new goals as executive director of UNAIDS with Prashant Nair.
Merck's newly appointed chief strategy officer, Mervyn Turner speaks with Prashant Nair about the future promise of drug development and about how pharmaceutical companies can cope with the current economic downturn.