Practice

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Public Health Surveillance: Immunity, Testing, and Contact Tracing

Q&A with Abram Wagner

Long before we could sequence a virus’s genome in a matter of weeks, we used public health tactics like contact tracing to sort out the movement of a disease in a population. Contact tracing is one of the “traditional” tools of epidemiologists. Today, we have more public health surveillance tools at our disposal, and we’ll need both the old and the new to bring COVID-19 under control.