Classroom floor swab, County of San Diego (IMAGE)

University of California - San Diego

Classroom floor swab, County of San Diego

Caption

As part of the surface monitoring step in the early alert program, Tamara Jerjees, Vista Grande Elementary School teacher assistant, uses a swab to sample a one-square-foot section of the center of the floor in a classroom, which is where aerosols tend to settle.

Credit

County of San Diego

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