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A COVID-19 outbreak at an elementary school in Marin County is a case study of how contagious the delta variant is.
The Centers for Disease Control and Prevention reported that an unvaccinated teacher felt ill in May and assumed he had allergies. School policy required them to be masked, but the teacher removed their mask to read aloud and within days half of the 24 students tested positive.
The classroom layout shows students’ COVID-19 test results by seating chart. (August 27, 2021)
The infection rate in the first two rows of the classroom, closest to the teacher, was 80% – eight out of 10 students.
The sick students then infected siblings and parents, for a total of 26 people, from a single case.
“It is safe to say that the index case was an unvaccinated person who was eligible to be vaccinated,” Dr Matt Willis, county public health official, told the Mercury News. “All cases are unvaccinated individuals. This includes people eligible to be vaccinated but not vaccinated and people who were not eligible to be vaccinated, due to their age. “
Jessica Aguirre from NBC Bay Area spoke with Tracy Lam-Hine from the Marin County Department of Health and lead author of the CDC’s study into the COVID-19 outbreak among Marin County elementary teachers .
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