In 2020, many state and local health departments ramped up hiring staff to do contact tracing. Joseph Ortiz was working as a contact tracer in New York City last summer. John Minchillo/AP hide caption
Contact Tracing Survey Tracking the public health workforce during the coronavirus crisis
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Contact Tracing Survey
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Contact tracer Toni Parlanti of Stamford, Conn., calls a person identified as having been potentially exposed to the coronavirus this week. States and territories report they have more than 70,000 people working on contact tracing as of December. John Moore/Getty Images hide caption