New Hampshire is opening four fixed vaccination sites to deal with increasing demand for the COVID-19 vaccine and booster shots.** Video above is previous coverage of difficulties some New Hampshire pharmacies have had meeting demand for booster shots. **Gov. Chris Sununu said all four sites will be walk-in only, with no scheduled appointments available. COVID-19 vaccines and booster shots are free."With the winter surge upon us, we are opening every door of opportunity, including additional vaccination sites, so that New Hampshire residents can take proactive steps to help themselves, their friends and their neighbors stay healthy," Sununu said.Some Granite Staters have been reporting difficulties in scheduling booster shots at pharmacies, especially as Christmas approaches. "The state fixed vaccination sites provide New Hampshire residents additional opportunities to get vaccinated or a booster dose without having to make an appointment," said Department of Health and Human Services Commissioner Lori Shibinette. "The demand for vaccines demonstrates New Hampshire’s resiliency as we all work to protect our most vulnerable citizens from COVID-19."Officials warned that because the sites are for walk-ins only, there may be long lines at times. People should bring their vaccine cards with them if they are going for a second shot or booster.While the vaccination sites do have operating hours on Saturdays, health officials said they won't be running this Saturday because of the Booster Blitz event.The following fixed sites are currently open:BerlinThe Chalet at 161 East Milan RoadMonday-Friday: 10 a.m.-7 p.m.Saturday: 9 a.m.-2 p.m.Sunday: ClosedPlymouthThe Common Man Event Room at 231 Main St. Monday-Friday: 10 a.m.-7 p.m. Saturday: 9 a.m.-2 p.m. Sunday: ClosedClaremontFormer NH State Liquor Store at 367 Washington St. Monday-Friday: 10 a.m.-7 p.m. Saturday: 9 a.m.-2 p.m. Sunday: ClosedThe following site opens later this week:RochesterSpaulding Commons at 306 N. Main St.Opens Thursday, Dec. 9 Monday-Friday: 10 a.m.-7 p.m. Saturday: 9 a.m.-2 p.m. Sunday: ClosedMore information about the sites, including holiday hours, can be found on the On-Site Medical Services website.Appointment-based vaccinations can be found at vaccines.gov.To find the state's vaccine van, visit vaccines.nh.gov and click "Find the van."