Alliance for Pandemic Preparedness

July 27, 2020

Comparison of Viral Levels in Individuals with or without Symptoms at Time of COVID-19 Testing among 32480 Residents and Staff of Nursing Homes and Assisted Living Facilities in Massachusetts

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  • [Pre-print, not peer reviewed] Based on PCR testing for SARS-CoV-2 among nursing home residents (n=16,966) and staff (n=15,514with or without symptoms in Massachusetts (April 9 to June 9), 13% of residents and 4% of staff tested positive. Of those without symptoms, 13% of residents and 4% of staff tested positive, compared to 53% of residents and 18% of staff with symptoms. There was a statistical, though not meaningful, difference in viral loads between patients with and without symptoms (mean difference=0.71 cycles, p=0.006). 

Lennon et al. (July 26, 2020). Comparison of Viral Levels in Individuals with or without Symptoms at Time of COVID-19 Testing among 32480 Residents and Staff of Nursing Homes and Assisted Living Facilities in Massachusetts. Pre-print downloaded July 27 from https://doi.org/10.1101/2020.07.20.20157792