It is important to know the burden of disease. Though burden is defined using the number of people who are already infected. The 'burden of prevention' is also important.

HIV/AIDS was one of the five leading causes of disease burden in Malaysia, Myanmar, and Thailand in 2010.

Look at the informative graphic on page 61.

http://www.healthmetricsandevaluation.org/sites/default/files/policy_report/2013/world_bank/GBD_EAP_Parts/1_GBD%20EAP%20Report%20overview.pdf

Jamie