Pfizer Inc and Moderna Inc are starting to churn out doses of omicron-specific vaccines, and they say they could have data on whether the shots are effective as soon as March. But is this the best way to build and maintain protection against Covid-19? The world is breeding new variants so fast, it may not make sense to chase ...

On Christmas eve, Gazprom, the Russian state-owned natural gas giant, tweeted a rather unfestive message: Gas inventories in Europe were depleting quickly. Since then, Gazprom has been reminding the world of the trend every few days. “It should be noted that gas reserves in Europe’s UGS (underground gas storages) are currently at their lowest for the season in the long ...

  Britain’s decision to leave the European Union has imperiled London’s status as the region’s financial center. So far, the loss of jobs has been more of a dribble than an exodus. But the current hiatus masks a longer-term threat, as companies choosing where to house new positions expand elsewhere. At the moment, British banking is thriving. UK financial-services firms ...