What is epidemiology?
According to the National Institute of Health “Epidemiology is a branch of medical science that investigates all the factors that determine the presence or absence of diseases and disorders. Epidemiological research helps us to understand how many people have a disease or disorder, if those numbers are changing, and how the disorder affects our society and our economy”.
Globally:
- At the end of 2013 there were 35.0 million people living with HIV.
- It is estimated that 0.8% of adults aged 15–49 years worldwide are living with HIV
- 1.5 million people died of aids related illness in 2013
- Sub-Saharan Africa remains most severely affected, with nearly 1 in every 20 adults living with HIV and accounting for nearly 71% of the people living with HIV worldwide.
United States:
- 1,201,100 persons aged 13 years and older are living with HIV, 168,300 (14% or 1 in 7) are unaware they are infected.
- Gay and bisexual men of all races are most affected.
- By race, blacks/African Americans face the most severe burden of HIV.
- About 50,000 new HIV infections per year.
- in 2013 47,352 people were diagnosed with HIV and 26,688 people were diagnosed with AIDS.
- 13,712 people with an AIDS diagnosis died in 2012 (death may or may not have been related to AIDS).
Estimated New HIV Infections in the United States, 2010, for the Most Affected Subpopulations
*Subpopulations representing 2% or less are not reflected in this chart. Abbreviations: MSM, men who have sex with men; IDU, injection drug user.
https://www.aids.gov/hiv-aids-basics/hiv-aids-101/statistics/
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