Smallpox is an infectious disease caused by the virus
orthopoxvirus variolae, one of the biggest virus that affects humans. He was
known when a mummy from 1550-1307 BC showed traces of the virus. Upon entering in
the human organism, the virus on a given host cell where proteins and their manufacture
multiply in the cytoplasm of the same. The body's immune system reacts against
the virus by destroying the cells before the virus multiple, but the immune
system is unable to completely block the multiplication of the virus because it
produces the protein causes the same to be resistant to antibodies.
Disease transmission occurs through contact with sick people
and the objects used by the same person. After 14 days of incubation, the
disease begins to manifest, the first symptoms are fever, malaise, fatigue,
body aches, red spots, vomiting and nausea. The red spots that appear on the
skin become purulent bubbles after a period dry and form scabs.
As the disease weakens, the immune system of the individual
there is a great possibility of this period, contracting new diseases and
infections. How is a disease caused by a virus, there are no specific
treatments, and the concern is focused on the consequences that the disease can
leave. The disease can be prevented by establishing vaccine immunity against
the virus. Currently, smallpox is a disease virtually extinct since a long time
does not make victims, however there is concern there chemical weapons with the
virus used to kill enemies in combat.
Source: http://www.who.int/csr/disease/smallpox/en/
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