WASHINGTON—A measure of U.S. services industry activity dropped to an 11-month low in January as a resurgence in COVID-19 infections hurt demand at high contact businesses and kept workers at home. The Institute for Supply Management said on Thursday its non-manufacturing activity index fell to 59.9 last month, the lowest reading since February 2021, from 62.3 in December. A reading above 50 indicates growth in the services sector, which accounts for more than two-thirds of U.S. economic activity. Economists polled by Reuters had forecast the index falling to 59.5. The slowdown in services industry activity was the latest indication that the economy lost considerable momentum in January as coronavirus infections, driven by the Omicron variant, lashed the nation. The ISM reported this week that its measure of national manufacturing activity dropped to a 14-month low in January. The ADP National Employment report on Wednesday showed private payrolls fell last month …