Walmart, Uber and other major companies announced new policies this week to grant paid leave or other compensation to workers who contract the new coronavirus or are quarantined by order of the government or their companies.

The changes could help hourly and gig-economy workers in the service industry who do not normally receive paid time off, and who would bear an especially difficult burden of lost wages. But the policies may not go far enough to protect delivery people, store clerks, restaurant workers, taxi drivers and others whose public-facing and often low-paying jobs cannot be done remotely.

Walmart, the largest private employer in the country with 1.5 million workers, said on Tuesday that employees who contract the virus or who are subject to mandatory quarantines would receive up to two weeks of pay, and that absences in that time would not “count against attendance.”