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As the leading cause of viral gastroenteritis worldwide, norovirus is an all too familiar ailment. Its telltale digestive upset—not to mention its reputation for being notoriously contagious—has earned it the nicknames "winter vomiting bug" and "stomach flu." Yet despite millions

Scientists have detected the highly contagious H5 bird flu strain in a second Australian state, the nation's agriculture minister said Wednesday.

Researchers have identified a severe outbreak of a rare contagious cancer in soft-shell clams in Washington state's Puget Sound and found evidence that the disease was recently introduced to the Pacific Northwest from Atlantic Coast populations.