Polio vaccine in india,hepatitis-b,yellow fever,meningitis:
Polio is an infectious
disease caused by a virus that lives in the throat and intestinal tract. It is
most often spread through person-to-person contact with the stool of an
infected person and may also be spread through oral/nasal secretions. Polio used
to be very common in the United States and caused severe illness in thousands
of people each year before polio vaccine was introduced in 1955. Most people
infected with the polio virus have no symptoms; however, for the less than 1%
who develop paralysis it may result in permanent disability and even death.
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