But possible new prevention strategies, such as vaginal microbicides and prophylactic drugs, will take time to slow the rise in infection, even if they prove efficacious.

• 但是可能的防艾滋新策略，如阴道微生物杀剂和避孕药，但是即便它们被证明是有效的，要使得感染的人数上升的趋势有所下降，也要花上一些时日。