Henrik Heitmann, Elisabeth Fischer, Philipp Wagner, Dennis Pötter, Martin Gartmeier, Friederike Schmidt-Graf
Flipping the classroom in neurological bedside teaching: a prospective controlled study
BMC medical education
may 25 2021 marin county department public health mcph notified elementary school may 23 unvaccinated teacher reported receiving positive test result sarscov2 virus causes covid19 teacher reported becoming symptomatic may 19 continued work 2 days receiving test may 21 occasion time teacher read aloud unmasked class despite school requirements mask indoors beginning may 23 additional cases covid19 reported among staff members students parents siblings connected school characterize outbreak may 26 mcph initiated case investigation contact tracing included whole genome sequencing wgs available specimens total 27 cases identified including teacher may 2326 among teachers 24 students 22 students ineligible vaccination age received testing sarscov2 12 received positive test results attack rate two rows seated closest teachers desk 80 eight 10 28 four 14 three back rows fishers exact test p 0036 may 24june 1 six 18 students separate grade school also young vaccination received positive sarscov2 test results eight additional cases also identified parents siblings students two grades among additional cases three persons fully vaccinated accordance cdc recommendations 1 among 27 total cases 22 81 persons reported symptoms frequently reported symptoms fever 41 cough 33 headache 26 sore throat 26 wgs 18 available specimens identified b16172 delta variant vaccines effective delta variant 2 risk transmission remains elevated among unvaccinated persons schools without strict adherence prevention strategies addition vaccination eligible persons strict adherence nonpharmaceutical prevention strategies including masking routine testing facility ventilation staying home symptomatic important ensure safe inperson learning schools 3