Americans are dining again in restaurants, attending sporting events, and flying throughout the country. But most are still steering clear of their office building, a sign that more than health concerns are keeping workers away.

Millions of office employees who fled business districts in December after the Omicron variant surged continue to work at home, despite the plummeting rate of Covid-19 infections and hospitalizations. Remote work remains the more popular option even as a number of states have announced plans to roll back mask requirements at indoor venues, businesses, and schools as the spread of the Omicron variant fades.

Thousands of companies that closed their offices in March 2020 have yet to announce return plans. An average of 33% of the workforce returned to the office during the first week of February in the 10 major cities monitored by Kastle Systems, which records building-access-card swipes.