First and second graders at St. Vibiana's school are among the first to be inoculated for polio with the Salk vaccine in Los Angeles, Calif., April 18, 1955. (AP Photo) From Philly and the Pa. suburbs ...
So far, there’s only been a handful of measles cases in the Philadelphia region, but peak summer travel season is fast approaching. Public health experts urge people planning to visit areas with ...
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