Fig 1.
Schematic of study design showing timelines, environmental controls and monitoring, physical segregation arrangements, exposure intervention, and volunteer movements during quarantine study.
DFA: direct fluorescence assay; RH: relative humidity; NPS: nasopharyngeal swab.
Fig 2.
Intervention Recipients: wore face shields, used hand sanitizer every 15 min and only allowed to touch face with single-use wooden spatula; Control Recipients: did not use face shields or the specified hand hygiene protocol.
Table 1.
Infected donor status.
Fig 3.
Viral detection in Donors by day of exposure event.
A) Columns show the proportion of all infected donors (n = 42) who were qRT-PCR positive for viral shedding for coarse (>5μm) and fine (≤5μm) aerosols, and nasopharyngeal swabs. B) Mean and standard deviation error bars for qRT-PCR cycle threshold values from the positive nasopharyngeal swabs (n = 19 on day 1; n = 34 on day 2; n = 35 on day 3; n = 31 on day 4). C) Virus quantified (log10 RNA copies) from detectable exhaled coarse (n = 6) and fine (n = 14) breath aerosols by qRT-PCR; the boxes show the inner-quartile range (IQR) with a band to indicate the median, and whiskers extending to highest and lowest data points within 1.5 IQR.
Table 2.
Exhaled breath viral RNA detection and copy number among infected donors by quarantine event and aerosol fraction.
Table 3.
Recipient status.