1. UNAIDS. Global HIV and AIDS statistics—2020 fact sheet. 2020. https://www.unaids.org/en/resources/fact-sheet. Accessed 17 Feb 2021.
2. CDC. Pre-exposure prophylaxis (PrEP) and post-exposure prophylaxis (PEP). 2020. https://www.cdc.gov/hiv/clinicians/prevention/prep-and-pep.html#:~:text=Syndicate-,Pre%2DExposure%20Prophylaxis%20(PrEP)%20and,Post%2DExposure%20Prophylaxis%20(PEP)&text=PrEP%20is%20a%20prevention%20method,contact%20or%20injection%20drug%20use. Accessed 18 Feb 2021.
3. WHO. Update of recommendations on first- and second-line antiretroviral regimens. Geneva: World Health Organisation; 2019.
4. Maartens G, Celum C, Lewin SR. HIV infection: epidemiology, pathogenesis, treatment, and prevention. Lancet. 2014;384(9939):258–71. https://doi.org/10.1016/S0140-6736(14)60164-1.
5. Kirchhoff F. HIV life cycle: overview. In: Hope TJ, Stevenson M, Richman D, editors. Encyclopedia of AIDS. New York: Springer; 2013. p. 1–9.