10 rules of dating

03-Mar-2016 02:00 by 9 Comments

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The resulting viral DNA is then imported into the cell nucleus and integrated into the cellular DNA by a virally encoded integrase and host co-factors.Once integrated, the virus may become latent, allowing the virus and its host cell to avoid detection by the immune system.

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Two types of HIV have been characterized: HIV-1 and HIV-2.

HIV-1 is the virus that was initially discovered and termed both LAV and HTLV-III.

It is more virulent, more infective, and is the cause of the majority of HIV infections globally.

The lower infectivity of HIV-2 compared to HIV-1 implies that fewer of those exposed to HIV-2 will be infected per exposure.

AIDS is a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive.

Without treatment, average survival time after infection with HIV is estimated to be 9 to 11 years, depending on the HIV subtype.

Infection with HIV occurs by the transfer of blood, semen, vaginal fluid, pre-ejaculate, or breast milk.

Within these bodily fluids, HIV is present as both free virus particles and virus within infected immune cells.

HIV infects vital cells in the human immune system such as helper T cells (specifically CD4 Lentiviruses have many morphologies and biological properties in common.

Many species are infected by lentiviruses, which are characteristically responsible for long-duration illnesses with a long incubation period.

Lentiviruses are transmitted as single-stranded, positive-sense, enveloped RNA viruses.

Upon entry into the target cell, the viral RNA genome is converted (reverse transcribed) into double-stranded DNA by a virally encoded reverse transcriptase that is transported along with the viral genome in the virus particle.

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