12 March 2021 Rolling out home-based testing and universal treatment for HIV is cost-effective and can cut the incidence of cases in high-prevalence communities. These are the findings of a major HIV-prevention study involving more than one million people in Zambia and South Africa, published in HIV/AIDS continues to cause a devastating burden globally. Unfortunately, having highly effective medical treatments does not mean they reach those who need them most. Dr Katharina Hauck Study author Using modelling of HIV incidence and the cost of the interventions, researchers found that widespread home-testing for HIV and the onward referral and treatment of positive cases, can be delivered at an annual cost of less than $8 per person.