(Beaver Dam) Marshfield Medical Center – Beaver Dam is hosting a walk-in COVID vaccination clinic this week. Doors will open at 8am Wednesday, with doses being administered until 3:30pm or as supplies lasts. Hospital officials say 200 single-dose Johnson and Johnson vaccines will be available for those 18 and older. Appointments and pre-registration will not be available. Those interested need to bring a photo ID and insurance card. There are no residency restrictions and you do not need to be a current Marshfield Medical Center – Beaver Dam patient. On the day of the clinic, visitors are asked to use the courtyard entrance by the flagpoles. Spanish translation will be available onsite from eight to 11am. A notice will be posted to the hospital’s Facebook page when all vaccines have been allocated.