WASHINGTON — President Joe Biden is expected to outline his plans Thursday to combat the coronavirus this winter with measures that would largely put the U.S. out of step with other countries that are clamping down on the new and worrying omicron variant.

The administration’s strategy will focus mostly on ramping up existing Covid-19 procedures and promoting vaccinations and booster shots, according to the White House, without pursuing many of the restrictions that are being imposed in other parts of the world. ...