Viatris Inc. and Atomo Diagnostics Limited announced a multi-year agreement with Unitaid to expand access to HIV self-testing in low- and middle-income countries (LMICs). The agreement reached between Unitaid and Viatris (through its subsidiary Mylan), with support from Atomo, represents a significant market expansion of HIV self-testing, with commitments to make testing available in 135 eligible countries. Designed and manufactured by Atomo, the Mylan HIV Self-Test is distributed by Viatris in low-and middle-income countries. The test is prequalified by the World Health Organisation and detects the presence or absence of HIV antibodies in a small blood sample obtained from a fingertip. Unlike standard, multi-component HIV test kits, the test developed by Atomo is an integrated, handheld device that reduces common sources of user error and offers unmatched usability.