For more detailed recommendations on testing for acute HIV infection:

CDC/APHL HIV testing recommendations for laboratories: According to the CDC/APHL recommendations in Figure 2, laboratories should conduct initial testing for HIV with an FDA-approved Ag/Ab combination immunoassay that detects HIV-1 and HIV-2 Abs and HIV-1 p24 Ag to screen for established infection with HIV-1 or HIV-2 and for acute HIV-1 infection. Importantly, data are insufficient to recommend use of the Alere Determine rapid HIV-1/2 Ag/Ab combination immunoassay as the initial assay in the algorithm.

Worried you might have HIV? Have an HIV test - it's the only way to know for sure.
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In clinical trials of treatment for HIV infection, the most common side effects of tenofovir disoproxil fumarate/emtricitabine (TDF/FTC) were mild and short-lived: diarrhea, headache, abdominal pain, weakness, and nausea. Gastrointestinal side effects can be alleviated with antidiarrheal agents, anti-gas medications, and antiemetics, as needed. Most side effects peak at 1 month and generally resolve within 3 months [1]. Two weeks after initiation of PrEP, clinicians should follow up either in person or by telephone to assess side effects.


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Worried you might have HIV? Have an HIV test - it's the only way to know for sure.
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Fourth-Generation HIV-1/2 Ag/Ab Combination Immunoassays: HIV-1/2 Ag/Ab combination immunoassays, also referred to as 4th-generation immunoassays, are capable of detecting HIV-1 p24 Ag, which is the viral capsid protein and is present during acute HIV-1 infection, as well as IgM and IgG Abs to HIV-1 and HIV-2. Although 4th-generation immunoassays cannot detect HIV infection during the eclipse phase, when neither Ag nor RNA is detectable, the ability to identify both HIV-1 p24 Ag and HIV-1/2 Abs in a single screening test enables detection of HIV early in the acute phase, during the seroconversion period, and throughout established infection. Consequently, 4th-generation Ag/Ab combination immunoassays have a distinct advantage over all of the earlier generation screening assays that only detect Abs. For this reason, it is recommended that a 4th-generation HIV-1/2 Ag/Ab combination immunoassay be used as the initial screening test for all adults and children age 2 years and older. If the Ag/Ab test is nonreactive, then the interpretation is that the test is negative. As is the case for all of the HIV screening tests, false-positive results can occur. Therefore, supplemental testing is performed when a specimen is reactive on the step 1 HIV Ag/Ab immunoassay. The recommended next step is to perform an HIV-1/2 Ab-differentiation assay (see below).


HIV Home Testing: Check Yourself with the Rapid HIV Test

All participants received a comprehensive package of HIV-1 prevention services: HIV-1 testing with counseling before and after testing, individual and couples risk-reduction counseling, screening and treatment for sexually transmitted infections, free condoms with training and counseling, and referral for male circumcision and postexposure prophylaxis according to national policies. Vaccination against hepatitis B virus was also offered.

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Methods. We analyzed visitrecords for heterosexualAfrican American men who underwent HIV testing while attending sexuallytransmitted disease (STD) clinics in Baltimore, Maryland, from 1993 to2000. We used multivariable binomial regression to evaluateassociations between circumcision and the risk of HIV infection amongvisits by patients with known and unknown HIV exposure.

MHRP | Military HIV Research Program

At every scheduled visit, subjects received a comprehensive package of prevention services, including HIV testing, risk-reduction counseling, condoms, and diagnosis and treatment of symptomatic sexually transmitted infections, including gonorrhea and chlamydia urethritis, syphilis, and herpes simplex virus type 2 (HSV-2). In addition, at 24-week intervals, subjects were screened for asymptomatic urethritis, syphilis, antibodies to HSV-2, and genital warts and ulcers; treatment was provided when indicated. Sexual partners were offered treatment of sexually transmitted infections that were diagnosed in the subject. Subjects were linked to local prevention and treatment services when required to receive standard-of-care services. All subjects were instructed to protect themselves from HIV with conventional methods, since they were unaware of their study-group assignment. Subjects who reported a recent unprotected exposure to an HIV-infected partner were referred for postexposure prophylaxis (at sites where such therapy was available), and the administration of a study drug was temporarily suspended. Vaccination against hepatitis B virus (HBV) was offered to all susceptible subjects.