The world’s largest open scientific conference on HIV and AIDS will be held in Mexico City in July 2019. IAS 2019 will take place at the Centro Citibanamex on 21-24 July 2019. Held every two years, the IAS Conference on HIV Science is a unique forum for scientists, clinicians, public health experts and community leaders to examine the latest research developments in HIV science and explore how to realistically apply and implement that knowledge to address the epidemic.