Among people ages 13 to 19, more than 8,200 were diagnosed with HIV in 2017.2 However, this does not include the number of youth that have not (yet) been diagnosed. At the end of 2016, the government estimated that 50,900 youth had HIV in the United States; but only 56 percent knew they had it.3 See the latest HIV/AIDS statistics by age.
Many people infected with viral hepatitis don’t have any symptoms and so don’t know they have the infection. It is estimated 3.5 million people are living with hepatitis C and 850,000 people are living with hepatitis B, the two most common forms of the virus. See the latest hepatitis statistics.
2 Centers for Disease Control and Prevention. HIV Surveillance Report. Atlanta, GA, October 2019. Available at http://www.cdc.gov/hiv/statistics/basics/ataglance.html.
3 Centers for Disease Control and Prevention. HIV Among Youth. Atlanta, GA, April 2010. Available at https://www.cdc.gov/hiv/pdf/group/age/youth/cdc-hiv-youth.pdf.