Diagnosis of HIV infection: The term refers to persons diagnosed with HIV infection, regardless of the stage of disease at diagnosis (i.e., HIV infection Stage 0, 1, 2, 3 [AIDS], or unknown). 
Transmission category: The term for summarizing the multiple risk factors that a person may have had by selecting the one most likely to have resulted in HIV transmission. For surveillance purposes, persons with more than one reported risk factor for HIV infection are classified in the transmission category listed first in a hierarchy of transmission categories, and therefore counted only once. The exception is men who had sexual contact with other men and injected drugs; this group makes up a separate transmission category. 
Male-to-male sexual contact (MSM): Persons whose transmission category is classified as male-to-male sexual contact include men who had sexual contact with other men and men who had sexual contact with both men and women. 
Injection drug use (IDU): Persons whose transmission category is classified as injection drug use are persons who received an injection, either self-administered or given by another person, of a drug that was not prescribed by a physician for this person. The drug itself is not the source of the HIV infection, but rather the sharing of syringes or other injection equipment which can result in transmission of bloodborne pathogens, such as HIV. 
Male-to-male sexual contact and injection drug use (MSM & IDU): Persons whose transmission category is classified as male-to-male sexual contact and injection drug use include men who had injected drugs as well as had sexual contact with other men or sexual contact with both men and women. 
Heterosexual contact: Persons whose transmission category is classified as heterosexual contact are persons who had heterosexual contact with a person known to have, or to be at high risk for, HIV infection. 
Perinatal transmission: Persons whose transmission category is classified as perinatal transmission refers to HIV transmission from mother to child during pregnancy, labor and delivery or breastfeeding.
Suppression: Suppression is applied to overdose visit counts of 1 to 4 and rates with numerators of 1 to 4 to maintain confidentiality and accurate rate calculations. Suppressed statistics are indicated with an asterisk (*).
New HIV Diagnoses: New HIV Diagnoses first diagnosed in Virginia.
Rate Calculations: HIV Diagnoses rates are presented as a rate per 100,000 population. Rates for case counts less than 12 are considered unstable and should be interpreted with caution.
Reporting: All data reported to the Virginia Department of Health per reporting requirements outlined in the Code of Virginia Section 32.1-39 and Section 32.1-40. Number of diagnoses for the most recent year are considered preliminary and may be incomplete due to reporting delays.
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Year of Diagnosis, Locality, Case Count, Rate
- Centers for Disease Control and Prevention. Terms, Definitions, and Calculations Used in CDC HIV Surveillance Publications. https://www.cdc.gov/hiv/pdf/statistics/systems/nhbs/cdc-hiv-terms-surveillance-publications-2014.pdf. October 2019.