"PrEP reduces the risk of getting HIV from sex by about 99 percent when taken as prescribed. Although there is less information about how effective PrEP pills are among people who inject drugs, we know that PrEP pills reduce the risk of getting HIV by at least 74 percent when taken as prescribed," the CDC says.

For oral medications that prevent new HIV infection to be effective, the patient must take certain actions, including attending doctor's visits every three months and—most importantly—cons

For oral medications that prevent new HIV infection to be effective, the patient must take certain actions, including attending doctor's visits every three months and – most importantly – consistency.

A vaccination with the drug lenacapavir offers an effective protection against a HIV infection, according to newly published research from the pivotal phase-three study "Purpose 2". The option to vaccinate against HIV only every six months is a genuine breakthrough,

The Phase III Purpose 2 trial compared the safety and efficacy of twice-yearly subcutaneous lenacapavir for pre-exposure prophylaxis (PrEP) against once-daily oral Truvada.