After the new Headmistress Hope begins to scare students with her less-than-suitable version of an SRE (sex and relationship education) curriculum, a number of students decide to visit a sexual health clinic to talk through their concerns.
One student, Anwar (played by Chaneil Kular), discovers that his facial swelling is a result of an allergic reaction to strawberry-flavoured lube, which initially raised cause for concern about developing HIV. The doctor then reveals that if he and his sexual partners are getting tested regularly and practising safe sex, then it's very unlikely he'll get HIV.
The doctor also educates him on HIV prevention in the form of pre-exposure prophylaxis, commonly known as PrEP. This strategy involves HIV-negative patients taking medications like Truvada and Descovy in order to reduce their risk, should they be exposed to the virus. (Taking Truvada every day can lower your risk of getting HIV from sex by more than 99 percent, per the US Centers For Disease Control.) It's important to note, though, that the medication is only effective when taken as prescribed and should be given to you by a doctor.