The B.1.1.7 coronavirus variant first identified in the United Kingdom is now the most common strain of Covid-19 in the United States, according to US Centers for Disease Control and Prevention Director Dr. Rochelle Walensky. [Source]
Wall Street has been riding high as America's vaccination program exceeded expectations, lifting prospects of a speedy economic recovery. But a potential major disruption to that campaign sent stocks in reverse Tuesday.
The World Health Organization has warned that the world needs a "reality check" on the state of the pandemic, as countries abandon restrictions despite four weeks of rising deaths and seven weeks of rising cases globally.
US officials are racing to vaccinate as many Americans as possible to beat another Covid-19 surge -- and doses are being administered at a record pace.
US health agencies are taking concerns about blood clots and the Johnson & Johnson Covid-19 vaccine "seriously" and are working to assess whether the shot is associated with a very small increased risk of rare blood clots, a federal official told CNN.
