Temporary COVID-19 vaccination site established in Marion, Ill. The temporary COVID-19 vaccine clinic at Heartland Regional Medical Center will be open starting at 8 a.m. on Monday, April 12. (Source: Tayler Davis/KSLA News 12) By Amber Ruch | April 5, 2021 at 2:24 PM CDT - Updated April 5 at 2:24 PM MARION, Ill. (KFVS) - The Illinois National Guard will establish a temporary COVID-19 vaccination site at Heartland Regional Medical Center. It will be open starting at 8 a.m. on Monday, April 12. Vaccinations will be provided to as many as 500 eligible people. Anyone 18 years or older is eligible to be vaccinated. Those who are 18 must have a parent or guardian physically with them when they get the vaccine.