😱🤯குரங்கில் இருந்து வந்துச்சா? | How humans got AIDS for first time | How humans got
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How Did Humans First Get HIV? The Shocking Origin of AIDS
HIV did not suddenly appear in humans — it crossed over from animals. Scientists have traced the origin of the most common type of HIV (HIV-1) to a virus found in chimpanzees called SIV (Simian Immunodeficiency Virus). Research shows that this transmission most likely occurred in Central Africa, particularly in regions around present-day Democratic Republic of Congo. When humans hunted and butchered chimpanzees for bushmeat, infected blood entered cuts or wounds on their skin. Over time, the virus adapted inside the human body, mutated, and eventually became HIV. Genetic studies have confirmed that HIV-1 Group M — the strain responsible for the global pandemic — originated from chimpanzees, while HIV-2 came from sooty mangabey monkeys in West Africa.
The epicenter of early HIV spread was the city of Kinshasa in the early 1900s. During the colonial period, rapid urbanization, railway expansion, labor migration, and limited medical sterilization practices helped the virus silently spread between people. At that time, no one knew the virus existed. It spread quietly for decades before being officially identified in 1981 in the United States, when unusual infections began appearing in young adults with weakened immune systems. Later genetic analysis revealed that HIV had already been circulating in humans since at least the early 20th century.
It is important to understand that HIV does not newly develop inside a person without contact. It must come from another infected human through specific transmission routes — such as unprotected sexual contact, sharing contaminated needles, blood transfusions (before screening practices were introduced), or from mother to child during pregnancy, childbirth, or breastfeeding. HIV cannot arise spontaneously in the body. The virus we see today is the result of cross-species transmission followed by decades of human-to-human spread.
This story is not just about a virus — it is about evolution, migration, colonial history, and how human activity can influence disease emergence. Understanding how HIV began helps scientists prevent future pandemics caused by zoonotic spillover — when diseases jump from animals to humans. From African forests to global cities, HIV’s origin teaches us a powerful lesson about biology, environment, and human behavior.
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