Preventive Treatment Like Truvada Won’t Stop HIV. Only a Vaccine Can by Noah Sather from on 2016-03-30 19:19 (#18SQG) Drugs-no matter how effective they are-may never be enough to fully eradicate HIV-1. Only a vaccine will. The post Preventive Treatment Like Truvada Won't Stop HIV. Only a Vaccine Can appeared first on WIRED.