On-demand pre-exposure prophylaxis for HIV

Efficacy, safety, and effect on sexual behaviour of on-demand pre-exposure prophylaxis for HIV in men who have sex with men: an observational cohort study – The Lancet HIV (free registration required)

Commentaries: PrEP on demand or every day? – The Lancet HIV (free registration required) AND HIV pre-exposure prophylaxis can be taken as needed – Reuters (free)

“four doses of PrEP around the time of sexual activity cut the risk of HIV by 97 percent” (from Reuters Health)