PORTLAND, Maine (AP) Maine’s push to deliver more COVID-19 vaccine includes longer hours and weekend service as the state prepares to open eligibility to 660,000 members of the general public in six weeks.

The vaccine is currently available to people age 60 and older, and availability will widen to those 50 and older on April 1. By May 1, the vaccine is supposed to be available for all adults in the state.

The state is working with providers to determine if they have the capacity to increase both the number of shots delivered and the hours and days of clinics, said Dr. Nirav Shah, director of the Maine Center for Disease Control. The effort could require more staffing, including family doctors and independent pharmacies.

“Basically what my message to vaccination sites across Maine is, ‘Let’s drill the well before we get thirsty,’” he said.