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A new study, led by researchers at the University of Texas (UT) at Austin, calculated the so-called serial interval of SARS-CoV-2, the virus that causes COVID-19. 

 

The serial interval describes “the duration between symptom onset of a primary case and symptom onset of its secondary cases.”

 

The new study, which will appear in the journal Emerging Infectious Diseases, found that the average serial interval for COVID-19 is 4 days.

 

Study co-author Lauren Cancel Meyers, a professor of integrative biology at UT Austin, explains what this means. 

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