New World screwworm was largely eradicated from the U.S. and Central America in the 1960s and 1980s, respectively. But the potentially fatal parasite is starting to make a comeback, U.S. officials say.
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New World screwworm was largely eradicated from the U.S. and Central America in the 1960s and 1980s, respectively. But the potentially fatal parasite is starting to make a comeback, U.S. officials say.