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Mark Evans may just have the fastest tests in the west.

In La Cañada, Calif., where Evans is associate superintendent of the school district, schools administer Covid-19 tests five times a week. By 5 p.m., they’ve been dropped off at a lab for processing. And most days, Evans says, he has results in hand before 7 a.m. — in time for him to call up parents and let them know if their kids can head into school.

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