It’s a new front line in the war against COVID-19, and an army of Americans are training as disease detectives using phones to trace the spread of the virus and reduce transmission.  Epidemiologists believe contact tracing is a critical step in ending the pandemic and reopening the economy safely due to the success seen in fighting polio and smallpox, but many are concerned about their privacy.









Watch THE DR. OZ SHOW, weekdays at 4 p.m. on CBS 62.


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