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The World Health Organization estimated that in 2000, 66,000 hepatitis B, 16,000 hepatitis C, and 1,000 HIV infections were caused by needlestick injuries. [4] [2] [7] In places with higher rates of blood-borne diseases in the general population, healthcare workers are more susceptible to contracting these diseases from a needlestick injury. [7]
In the case of HIV exposure, post-exposure prophylaxis (PEP) is a course of antiretroviral drugs which reduces the risk of seroconversion after events with high risk of exposure to HIV (e.g., unprotected anal or vaginal sex, needlestick injuries, or sharing needles). [22]
The risk of acquiring HIV from a needle stick from an HIV-infected person is estimated as 0.3% (about 1 in 333) per act and the risk following mucous membrane exposure to infected blood as 0.09% (about 1 in 1000) per act. [54] This risk may, however, be up to 5% if the introduced blood was from a person with a high viral load and the cut was ...
Following infection with HIV-1, the rate of clinical disease progression varies between individuals.Factors such as host susceptibility, genetics and immune function, [1] health care and co-infections [2] as well as viral genetic variability [3] may affect the rate of progression to the point of needing to take medication in order not to develop AIDS.
HIV transmission through injecting drug use remains rare, except in Bermuda and Puerto Rico. [73] Within the Caribbean, the country with the highest prevalence of HIV/AIDS is the Bahamas with a rate of 3.2% of adults with the disease.
WHO Disease Staging System for HIV Infection and Disease was first produced in 1990 by the World Health Organization [1] and updated in 2007. [2] It is an approach for use in resource limited settings and is widely used in Africa and Asia and has been a useful research tool in studies of progression to symptomatic HIV disease .
The transfer of and exposure to bodily fluids, such as blood transfusions and other blood products, sharing injection needles, needle-stick injuries (when medical staff are inadvertently jabbed or pricked with needles during medical procedures), sharing tattoo needles, and childbirth are other avenues of transmission.
Furthermore, the PARTNER study, [43] which ran from 2010 to 2014, enrolled 1166 serodiscordant couples (where one partner is HIV positive and the other is negative) in a study that found that the estimated rate of transmission through any condomless sex with the HIV-positive partner taking ART with an HIV load less than 200 copies/ml was zero.