How the disease detectives on the front lines of the COVID-19 pandemic track an outbreak

The CDC’s Epidemic Intelligence Service Program trains individuals how to perform contact tracing in order to help slow the spread of infectious diseases. Success from this strategy has been reported in South Korea regarding the coronavirus, and now the U.S. officers are deploying to find out more about "how contagious it is, how it spreads, the severity of the illness, what groups are most likely to be affected."

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