Low prevalence of COVID-19 Exposure is Coincident with Self-reported Compliance with Public Health Guidelines among Essential Employees at an Institute of Higher Education

Importance Detailed analysis of infection rates paired with behavioral and employee reported risk factors are vital to understanding how COVID-19 transmission may be inflamed or mitigated in the workplace. Institutes of Higher Education are heterogeneous work units that supported continued in person employment during COVID-19, providing an excellent test site for occupational health evaluation. Objective To evaluate self-reported behaviors and SARS-CoV-2 among essential in-person employees during the first six months of the COVID-19 pandemic. Design Cross-sectional, conducted from July 13-September 2, 2020. Setting Institute of Higher Education in Fort Collins, Colorado. Participants Employees identified to be an essential in-person employee during the first six months of the pandemic (1,522 invited, 1,507 qualified, 603 (40%) completed the survey). Of those completing the survey, 84.2% (508) elected to participate in blood and nasal swab sample collection to assess active SARS-CoV-2 infection via qRT-PCR, and past infection by serology (overall completion rate of 33.7%). Eligibility included > 18 years old, able to read and understand English, not currently experiencing cough, shortness of breath or difficulty breathing, fever >100.4F (38C), chills/shaking with chills, muscle pain, new or worsening headaches, sore throat or new loss of sense of taste/smell. Exposure Self-reported COVID-19 protective behaviors Main Outcome(s) and Measure(s) Current SARS-CoV-2 infection detected by qRT-PCR or previous SARS-CoV-2 infection detected by IgG SARS-CoV-2 testing platform. Results There were no qRT-PCR positive tests, and only 2 (0.39%) contained seroreactive IgG antibodies. Participants were 60% female, 90% non-Hispanic white, mean age 41 years (18-70 years). Handwashing and mask wearing were reported frequently both at work (98% and 94% respectively) and outside work (91% and 95% respectively) while social distancing was reported less frequently at work (79%) then outside of work (92%) [ p < .001 ]. Participants were more highly motivated to avoid exposures out of concern for spreading to others (83%) than for personal implications (63%) [ p < .001 ]. Conclusions and Relevance This is one of the first reports to document that complex work environments can be operated safely during the COVID-19 pandemic when employees report compliance with public health practices both at and outside work.