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UCSF Study: COVID-19 Arrived in California From Multiple Locations

University of California San Francisco researchers believe at least seven different COVID-19 lineages made their way into California. Genome detectives using a method called "Genomic epidemiology," tracked the virus evolution and spread in Northern California from late January to mid-March 2020. Samples from 36 patients spanning nine counties and the Grand...

Washington State Bill Limits Measles Vaccine Exemptions

OLYMPIA, Wash. — Washington state lawmakers voted Tuesday to remove parents' ability to claim a personal or philosophical exemption from vaccinating their children for measles, although medical and religious exemptions will remain. The vote comes as the number of measles cases nationwide this year has passed 600. The measure now heads to...