According to UNAIDS :
The HIV epidemic not only affects the health of individuals, it impacts households, communities, and the development and economic growth of nations. Many of the countries hardest hit by HIV also suffer from other infectious diseases, food insecurity, and other serious problems.
Progress has been made in preventing mother-to-child transmission of HIV and keeping mothers alive. In 2015, 77% of pregnant women living with HIV globally had access to antiretroviral medicines to prevent transmission of HIV to their babies; new HIV infections among children have declined by 50% since 2010.
New global efforts have been mounted to address the epidemic, particularly in the last decade. Prevention has helped to reduce HIV prevalence rates in a small but growing number of countries and new HIV infections are believed to be on the decline. In addition, the number of people with HIV receiving treatment in resource-poor countries has dramatically increased in the past decade.
Sources: HIV. gov