Use individual-, group-, and community-level interventions to provide education, support, and training that can affect social norms about HIV and other STIs
Notify partners exposed to an STI of their risk, encourage testing, and refer to services; also called contact tracing, or partner counseling and referral services
Restrict full contact between youth football players via limits to the number of contact practices, head hits per player, delay tackling until a certain age, etc.