Two of three polio viruses eradicated in 'historic' step, World Health Organization says - Vancouver Sun
Two of three polio viruses eradicated in 'historic' step, World Health Organization says Vancouver Sun
Glimpse of the Past: Polio epidemic in 1940s-1950s affected Mankato residents - Mankato Free Press
Glimpse of the Past: Polio epidemic in 1940s-1950s affected Mankato residents Mankato Free Press
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