WSIU Almanac: May 4, 2021. WSIU Public Broadcasting | By Kevin Boucher Published May 4, 2021 at 6:00 AM CDT Facebook Twitter LinkedIn Email Listen • 1:24 1 of 3 2 of 3 3 of 3 SSM Health is holding COVID-19 vaccination clinics in Mount Vernon and Centralia. To learn more, browse to: https://www.ssmhealth.com/locations/good-samaritan-hospital-mt-vernon