We do know that Gimple will return as showrunner and that Robert Kirkman, Gale Anne Hurd, David Alpert, Greg Nicotero and Tom Luse will all executive produce Season 6. The Walking Dead clearly has a long-term trajectory in mind.
In this scenario, it would cost about $500 per DALY. At 20% coverage, targeted PrEP would cost $800 per HIV DALY averted. At both levels of coverage, non-targeted PrEP would cost about $1400 per DALY. This picture changes if the costs of ART for people who would otherwise be infected is also included.
Truvada for PrEP provides 92%-99% reduction in HIV risk for HIV-negative individuals who take the pills every day as directed. If a daily dose is missed, the level of HIV protection may decrease. It only works if you take it. People who use PrEP correctly and consistently have higher levels of protection against HIV.