Alliance for Pandemic Preparedness

June 30, 2020

Exposures Before Issuance of Stay-at-Home Orders Among Persons with Laboratory-Confirmed COVID-19 — Colorado, March 2020.

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  • Marshall et. al. assessed COVID-19 exposures among a random sample of Colorado residents who had tested positive to SARS-CoV-2 in the 18-day period preceding Colorado’s stay-at-home-order on March 26. Only 27% (99/364) reported known contact with a laboratory confirmed COVID-19 case, 47% of which occurred at work and 24% within their household.  
  • Among the remaining 73% (265/364) who did not have known contact with a laboratory confirmed COVID-19 case, only 30% reported contact with a person who had fever or respiratory symptoms. The most commonly reported potential exposures were gatherings of >10 people (44%), domestic travel (29%), working in a health care setting (28%), visiting a health care setting (23%), and using public transportation (22%). 

Marshall et al. (June 30, 2020). Exposures Before Issuance of Stay-at-Home Orders Among Persons with Laboratory-Confirmed COVID-19 — Colorado, March 2020. MMWR. https://doi.org/10.15585/mmwr.mm6926e4