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Philip Drinker and Louis Shaw developed the
iron lung in 1928.
iron What is the Polio Virus? Franklin Delano Roosevelt is elected president
in 1932 and is the first and only president to
use a wheelchair.
World War II ends in 1945 and polio
epidemics occur almost immediately with
more the 20,000 cases yearly between 1945
and Pictures of Virus
Pictures Three Viruses
The three classifications of the Polio virus are
Types 1, 2, and 3
The viruses are RNA viruses
This means that the viruses affect the cell’’s
RNA and use it to multiple
RNA Causes of Infection
Infection is caused by contact with infected...
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- Fall '11