Wildlife tour groups aim to clean up 90 tons of marine debris in 90 days

Marine debris is seen in this file photo (CTV). Marine debris is seen in this file photo (CTV).

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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.