Articles for Leigh Johnson

How common are same-sex unions in South Africa? We found out

Our data repudiate the idea that same-sex relationships are a reflection of modernity or a Western cultural import

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Science | 14 November 2025

HIV incidence in South Africa has halved since 2010

This is mainly due to antiretroviral treatment and condom promotion, but male medical circumcision and behaviour change after HIV diagnosis had a role too

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Science | 9 February 2022

South Africaโ€™s HIV treatment programme: a phoenix rising from the ashes?

Over 4 million people are on treatment but the programme may be stuttering

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Analysis | 13 December 2017