AP
Pfizer, BioNTech start testing Omicron vaccine
From the Watch Now: Snowstorm traps thousands on Greek roads, and more of today's top videos series
Pfizer and BioNTech said on Tuesday they started a clinical trial to test a new version of their vaccine specifically designed to target the COVID-19 Omicron variant, which has eluded some of the protection provided by the original two-dose vaccine regimen. Fred Katayama reports.
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Thousands were trapped in their vehicles as a rare snowstorm hit Greece, watch a unique iceb…
