Listen Live
Donate
 on air
    Schedule

    KCRW

    Read & Explore

    • News
    • Entertainment
    • Food
    • Culture
    • Events

    Listen

    • Live Radio
    • Music
    • Podcasts
    • Full Schedule

    Information

    • About
    • Careers
    • Help / FAQ
    • Newsletters
    • Contact

    Support

    • Become a Member
    • Become a VIP
    • Ways to Give
    • Shop
    • Member Perks

    Become a Member

    Donate to KCRW to support this cultural hub for music discovery, in-depth journalism, community storytelling, and free events. You'll become a KCRW Member and get a year of exclusive benefits.

    DonateGive Monthly

    Copyright 2026 KCRW. All rights reserved.

    Report a Bug|Privacy Policy|Terms of Service|
    Cookie Policy
    |FCC Public Files|

    Back to Press Play with Madeleine Brand

    Press Play with Madeleine Brand

    How a new COVID strain emerged in California, and what it means for getting out of the pandemic

    Researchers at Cedars-Sinai Medical Center say a variant that originated in this state accounted for half of all virus samples collected in LA labs last week.

    • rss
    • Share
    By Madeleine Brand • Jan 22, 2021 • 8m Listen

    COVID-19 mutations have emerged in the UK, South Africa, Brazil and California. Researchers at Cedars-Sinai Medical Center say a variant that originated in this state accounted for half of all virus samples collected in LA labs last week.

    Jasmine Plummer is one of the researchers at Cedars-Sinai who discovered the CAL.20C variant. She says, "We were looking, actually, for the UK variant, knowing the UK variant was likely in California. We saw that it emerged — there was only one out of 1,230 [samples that looked like CAL.20C] in July."

    The presence of the variant increased starting in October and continued through the holidays, and by January 13 CAL.20C accounted for half of all virus samples collected in LA labs, according to the study.

    "We allowed it to emerge over the holidays, and that really is not separable from our behavior," Plummer says. "And so the same thing applies that applied in March. ... If it is more infectious, and it can be easily transmitted, it's really simple: We can wear a mask, wash our hands, and socially distance."

    • https://images.ctfassets.net/2658fe8gbo8o/AvYox6VuEgcxpd20Xo9d3/769bca4fbf97bf022190f4813812c1e2/new-default.jpg?h=250

      Madeleine Brand

      Host, 'Press Play'

    • KCRW placeholder

      Sarah Sweeney

      Vice President of Talk Programming, KCRW

    • KCRW placeholder

      Angie Perrin

      Producer, Press Play

    • KCRW placeholder

      Michell Eloy

      Line Editor, Press Play

    • KCRW placeholder

      Jasmine Plummer

      research scientist and molecular geneticist at Cedars-Sinai Medical Center

      NewsCoronavirusHealth & WellnessCalifornia
    Back to Press Play with Madeleine Brand