— and in much of the nation — due to the Omicron variant, which county health officials estimate to be five times more contagious than older strains.Although keeping campuses in operation
L.A. Unified has a significant advantage in having the infrastructure and experience of widespread, regular testing. The PCR tests are more precise in finding the presence of an infection but must be processed by a lab. A PCR test can show a positive reading before or after a person is contagious. The antigen tests are less accurate and won’t find all active infections but are reasonably effective at determining whether a person is contagious at the time of testing — and the results are ready in minutes, according to county health officials.
The district also is setting aside antigen tests so they can process students through as quickly as possible if they arrive to campus without clearance, Aguilar said. Parental consent is required for the district to test students, but for the vast majority this consent is on file because of last semester’s regular testing.
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