By: Ardis E. Parshall - March 13, 2020 First reports of a new strain of the flu – or a variation of the familiar avian A influenza virus that had already circled the globe several times at least as far back as 1889 – raised concerns in February 1957. Appearing first in Singapore, epidemiologists elsewhere began to take notice before it spread to Hong Kong in April and the eastern United States later that summer. Because it was a vari...
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