Chickenpox- A Viral Disease

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Chickenpox is a viral disease caused by the Varicella-zoster virus which is a DNA virus that is a member of the herpesvirus group. The virus undergoes a lysogenic cycle in which the virus replicates its DNA to make new virus particles. The varicella-zoster virus is spherical in shape. Chickenpox’s history has various contributors. Several corpses have been found with chickenpox as the apparent cause of death. In the 1500s, an Italian physician Giovanni Filippo gave the first description of varicella in literature and clearly distinguished it from scarlet fever; he is also known for other several important contributions to medicine, anatomy, and virology. In the late 1600s, English physician Richard Morton gave the name chickenpox to what he thought was a milder form of smallpox. Another English physician, William Heberden, undertook the first independent study of the disease in 1767, and he proved that chickenpox was actually different from smallpox. Since then much more information has been learned about chickenpox. Varicella is highly contagious. The virus spreads in the air when an infected person coughs or sneezes; there are droplets with the virus in the air. The incubation period for varicella is 14 to 16 days after exposure to a varicella rash, with a range of 10 to 21 days (“Clinical Overview”). Chickenpox displays several symptoms, but they can vary from person to person. The most common symptom is an uncomfortable, itch rash of red blisters scattered

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