PrEP has been around for a few years. It’s not a vaccine. Essentially it’s a mix of drugs that can be similar to those used for patients already infected with HIV, but the dosage and the composition is designed for people that don’t have HIV. The idea is to have drugs in your body that would kill the HIV before it starts spreading and infect your immune system. In Thailand, some drugstore can sell it around $15 a bottle which is good for 30 daily doses.