Marie Watson wanted to be among the first in line when she and other essential workers became eligible for the coronavirus vaccine — and with good reason.

The maintenance parts buyer for a Mission Foods tortilla plant in Pueblo, Colorado, had lost her father to COVID-19 in the fall and was told by a doctor last year that she herself almost certainly had the virus.

So when her union, the United Food Workers and Commercial Workers, secured appointments for the plant’s 200 workers, she jumped in her car and drove to a nearby drive-thru clinic for the first of two doses.

“There was this sense of relief,” Watson said. “This was more confirmation that I’m on my way to being normal.”

A growing number of labor unions and companies are securing shots for their employees as eligibility widens. Some large companies such as Amazon are offering workplace vaccinations through licensed health care providers, while smaller outfits are booking appointments for workers at outside locations.

For employers, the vaccines are a critical step toward restoring normalcy at a time when they expect a spike in demand for their services as more people get inoculated.

They are also betting that employees who did not initially trust the vaccine will have a change of heart when they see co-workers receiving it.

For workers, employer assistance with the vaccine eliminates hurdles, including transportation issues or maneuvering through a patchwork of websites to find appointments. That access could help to narrow the racial and socioeconomic gaps that have opened in the country’s vaccination drive.

Despite the growing number of companies offering on-site vaccinations, there are signs that some may have lost interest. In March, when vaccine eligibility was widening and distribution efforts improving in the U.S., a survey by the consulting firm Gartner found 30% of companies planned to bring vaccines to their employees. That was down from 42% in January, when distribution was still spotty and obtaining appointments was still extremely difficult for most people.

“The speed of the rollout has exceeded their expectations so companies are realizing they can take a back seat,” said Brian Kropp, chief of research at Gartner’s human resources practice.

Vaccinating employees is also less urgent for a growing number of companies that are adopting permanent remote-work policies, Kropp said. While nearly two-thirds of companies plan to reopen their workplaces by the end of this year, the majority say they will allow many employees to keep working from home at least some days, according to Gartner, which surveyed 300 companies.

But prominent companies continue to join the list of those offering on-site vaccinations.

Ford Motor Co. and the United Auto Workers opened up on-site vaccinations Monday in Michigan, Kansas and Ohio. In Ohio, Gov. Mike DeWine had initially put a stop to workplace clinics out of concern they would tie up supply, but he allowed them to resume last week as demand dropped at the state’s mass vaccination sites.

Employer-organized vaccination events, along with incentives such as bonuses or paid time off, allow companies to keep track of how many employees get vaccinated. Employers are legally allowed to require the vaccine, but the vast majority have shied away from doing so; some say it doesn’t make sense to do so until everyone is eligible and there is sufficient supply.