COVID-19 vaccine available without appointment at Hudson County Earth Day event Saturday Updated 3:22 PM; The Hudson County Vaccine Task Force and Jersey City will be offering the COVID-19 vaccine at the Hudson County Improvement Authority’s annual Earth Day celebration at Lincoln Park Saturday. The walk-up site does not require an appointment and will be available to all Hudson County residents over the age of 18. The vaccines will be administered by the Jersey City Health Department. The clinic will be open from 11 a.m. to 3 p.m. at Lincoln Park near the West Side Avenue entrance or until supplies last. Jersey City residents should bring a photo ID with them.