Since 2012, the last week of April has been World Immunization Week, a global public health campaign operated by the World Health Organization (WHO) with the goal of increasing rates of immunization against vaccine-preventable diseases worldwide.
This November 7, 1957 photograph shows employees of the Westinghouse Electric & Manufacturing Company’s South Philadelphia Works lining up to receive influenza A (H2N2) shots at the company dispensary in response to the 1957–1958 influenza pandemic.










