Grocery store workers in Massachusetts can now get free, priority testing for COVID-19 at two testing sites for first responders, the administration of Gov. Charlie Baker said Saturday.

Baker’s administration expanded access to the testing sites at Gillette Stadium in Foxboro and the Eastern States Exposition, home of the Big E, in West Springfield.

Grocery store workers can start receiving the testing on Saturday but must schedule an appointment first, Baker’s office said. Appointments can be made in advance by the worker’s supervisor or manager.

Workers do not need to be symptomatic to be eligible for testing, the governor’s office said.

At least one grocery store worker in Massachusetts has died after contracting coronavirus. The death of Vitalina Williams, who worked at Market Basket in Salem for 11 years, was announced earlier this week.

On Tuesday, the governor’s office announced new guidelines that require Grocery stores in Massachusetts to operate at 40% of their standard occupancy.

Baker on Saturday has also authorized the activation of an additional 3,000 military personnel of the Massachusetts National Guard. That brings the number of National Guard members responding to the COVID-19 crisis to 5,000. Those members may be tasked with supporting requests from state agencies for equipment, logistics, warehousing and related duties.

On Friday, the state Department of Public Health recommended that residents wear a face mask or face-covering in public when social distancing is not possible. The CDC has made the same recommendation.

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