Economic growth in the United States slowed sharply in the first weeks of the year due to supply chain disruptions, high prices, and labor shortages linked to the surge in Covid-19 infections, according to data from a purchasing managers survey released Monday.

The U.S. IHS Markit flash composite purchasing managers index, one of the first comprehensive looks at economic growth this year, fell to 50.8 in January from 57.0 in December, severely undershooting expectations and signaling almost no growth in the economy. Economists had forecast a reading of 56.7.

“Soaring virus cases have brought the U.S. economy to a near standstill at the start of the year, with businesses disrupted by worsening supply-chain delays and staff shortages, with new restrictions to control the spread of Omicron adding to firms’ headwinds,” said Chris Williamson, chief business economist at IHS Markit.