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Coronavirus: What you need to know

Biochemist Daniela Beatriz Ori manipulates swab samples to make a real time polymerase chain reaction (RT-PCR) analysis for COVID-19 testing at the biochemistry lab of Central Navy Hospital Dr. Pedro Malloon April 28, 2020 in Buenos Aires, Argentina. (Photo by Amilcar Orfali/Getty Images)
Heavy snow falls as people wearing face masks to curb the spread of COVID-19 cross a road in Burnaby, B.C., on Monday, December 21, 2020. THE CANADIAN PRESS/Darryl Dyck
People walk past a "we're open, heated terrace dining" sign at Eli's Essentials on the Upper East Side on February 02, 2021 in New York City. (Photo by Alexi Rosenfeld/Getty Images)
Mother putting a face mask on her daughter. (August de Richelieu/ Pexels)

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Why COVID-19 boosters weren't tweaked to better match variants

More COVID-19 booster shots may be on the way -- but when it's your turn, you'll get an extra dose of the original vaccine, not one updated to better match the extra-contagious delta variant. And that has some experts wondering if the booster campaign is a bit of a missed opportunity to target delta and its likely descendants.