Sheridan County Public Health — 307-672-5169. Sheridan Memorial Hospital is providing the following COVID-19 Vaccinations in our Outpatient Center, 1333 West 5th Street: Pfizer Booster (age 18 & over) and 1 st, 2 nd or 3 rd shots to individuals 12 and over on Tuesdays. Moderna Booster shot to individuals 18 and over on Thursdays.