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  Emerging viral infections in humans

Emerging viral infections in human beings:

Recent illustrations of emerging viral infections in various regions of the world comprise HIV, Dengue, Ebola virus, Hemorrhagic fever, Lassa fever, Rift valley fever, and SARS.

AIDS:

AIDS (Acquired Immuno Deficiency Syndrome) is a recently introduced sexually transmitted virus disease. AIDS is caused by Human Immuno Deficiency.

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 Figure: Human Immuno Deficiency Virus (HIV)

HIV belongs to a class of viruses termed as retroviruses. This infects the T4 lymphocytes termed as helper cells that form the main line of the body immune system. HIV kills the T4 lymphocytes and the resultant depletion of T4 cell population generates an immune deficiency. It paves way for numerous opportunistic pathogens to attack. AIDS by itself is not a murderer disease. It is only the other opportunistic pathogens that kill the infected persons.

 

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