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Public health surveillance, from social media to sewage, spots disease outbreaks early to stop them fastA cluster of people talking on social media about their mysterious rashes. A sudden die-off of birds at a nature preserve. A big bump in patients showing up to a city’s hospital emergency rooms.
The State Health Department has stepped up surveillance following an outbreak of acute diarrheal disease (ADD) in Uttara Kannada district among pilgrims, who returned from Pandharpur in Maharashtra.
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