The first big real-world study of the Pfizer/BioNTech vaccine to be independently reviewed shows the shot is highly effective at preventing COVID-19, in a potentially landmark moment for countries desperate to end lockdowns and reopen economies. Gloria Tso reports.
While most Texans had more than enough to worry about during the icy storm that led to power outages and water problem, some, like Tania Delacruz, had an added woe: Covid-19.
US reports 500,000 Covid deaths as vaccine drives gather momentum
![Pfizer vaccine is 94% effective in real-world study [Video]](https://video.newsserve.net/300/v/20210225/2102250642-Pfizer-vaccine-is-94-effective-in-real-world.jpg)
![Covid-19 patients on dealing with Texas storm while in hospital [Video]](https://video.newsserve.net/300/v/20210225/2102250228-Covid-19-patients-on-dealing-with-Texas-storm.jpg)
