Hong Kong flu has now made a virtual clean sweep of the U.S. At its worst, it reached epidemic proportions in 39 states, according to the National Communicable Disease Center in Atlanta. Ten other states reported more localized outbreaks. Only in Louisiana have there been too few individual cases to warrant the term epidemic.
In any influenza outbreak, the symptoms vary widely. Some specialists in epidemics and infectious diseases are convinced that the virus labeled A2-Hong Kong-68 is proving more variable than most preceding strains. For one thing, many victims describe symptoms...
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