The World Health Organization (WHO) has issued its first guidance to nations considering providing ARVs (antiretrovirals) to HIV-negative, high risk people. HIV is a retrovirus. Retroviruses are composed of RNA, not DNA; they have an enzyme (reverse transcriptase) which allows them to transcribe their RNA into DNA after getting into a cell, the retroviral DNA can then become an integral part of the host cell's chromosomal DNA. Antiretrovirals are medications used to manage or control infections caused by retroviruses...
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