Hamilton wins 100th F1 race to take lead over Verstappen

Mercedes driver Lewis Hamilton of Britain, second right, celebrates on the podium after winning the race alongside second place Red Bull's Max Verstappen and third place Ferrari's Carlos Sainz Jr. during the Russian Formula One Grand Prix at the Sochi Autodrom circuit, in Sochi, Russia, Sunday, Sept. 26, 2021. (Yuri Kochetkov/Pool Photo via AP) Mercedes driver Lewis Hamilton of Britain, second right, celebrates on the podium after winning the race alongside second place Red Bull's Max Verstappen and third place Ferrari's Carlos Sainz Jr. during the Russian Formula One Grand Prix at the Sochi Autodrom circuit, in Sochi, Russia, Sunday, Sept. 26, 2021. (Yuri Kochetkov/Pool Photo via AP)

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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.

Registered nurse Alix Zacharski, left, receives a Pfizer COVID-19 booster shot from Douglas Houghton, right, at Jackson Memorial Hospital Tuesday, Oct. 5, 2021, in Miami. (AP Photo/Lynne Sladky)

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