1976 swine flu outbreak strain. On July 23, the President sends a letter urging Congress to take action on indemnification. In early August an outbreak of illness in Philadelphia is thought to be related to swine flu. It is found to be an atypical pneumonia thereafter called Legionnaires' disease. On August 6, President Ford holds a press conference urging Congress to take action on the indemnification legislation. Four days later, both Houses of Congress pass the legislation. Merrill becomes the first company to submit samples to the FDA's Bureau of Biologics for safety testing, which approves it on September 2. Merck makes the first
Legionella The side chains of the cell wall carry the bases responsible for the somatic antigen specificity of these organisms. The chemical composition of these side chains both with respect to components and arrangement of the different sugars determines the nature of the somatic or O antigen determinants, which are essential means of serologically classifying many Gram-negative bacteria. "Legionella" acquired its name after an outbreak of a then-unknown "mystery disease" sickened 221 persons, causing 34 deaths. The outbreak was first noticed among people attending a convention of the American Legion—an association of U.S. military veterans. The convention occurred in Philadelphia during