View Comments OSHKOSH - The Winnebago County Health Department will offer free walk-in COVID-19 vaccinations to anyone over the age of 12 every Wednesday afternoon through the end of June. In a Tuesday afternoon news release, the department said the vaccination clinics will be open from 1 to 6 p.m. Wednesdays at Sunnyview Expo Center, 500 E. County Road Y. Appointments are not required, the health department said, and all three vaccines will be available to choose from. Pfizer is currently the only vaccine available to all individuals aged 12 and older. Anyone under the age of 18 should be accompanied by a parent or guardian.