âAct quicklyâ: Thousands of first dose vaccine appointments available to Mississippians Those eligible to receive the vaccine can book an appointment at https://covidvaccine.umc.edu/. (Source: WBTV) By Chris Thies | February 16, 2021 at 11:19 AM CST - Updated February 16 at 11:25 AM JACKSON, Miss. (WDAM) - Gov. Tate Reeves tweeted Tuesday morning that thousands of first dose COVID-19 vaccines are available in Mississippi. âAct quicklyâbook an appointment for yourself and loved ones!â the governor tweeted. Thousands of first dose appointments are available on https://t.co/zA6Xo2OJry right now! Act quicklyâbook an appointment for yourself and loved ones! Stay safe and God bless!â Tate Reeves (@tatereeves) February 16, 2021