Cook County Hospital issued the following announcement on May. 14.
Starting today, CCH is expanding hours at five of our mass vaccination sites. This will make it easier for individuals and families to get vaccinated and accommodate the expected increase in demand when the vaccine is approved for adolescents, 12 to 15.
Effective May 11, the following mass vaccination sites will be open from 8 AM to 8 PM, Monday through Friday, and 8 AM to 6 PM on Saturday:
Matteson, 4647 Promenade Way (Pfizer)
River Grove- Triton College, 2000 5th Avenue (Pfizer)
South Holland- South Suburban College, 15800 State Street (Pfizer)
Des Plaines, 1155 E Oakton Street (Pfizer)
Forest Park, 7630 West Roosevelt Road (Pfizer)
Hours will remain 8 AM to 6 PM, Monday through Saturday at the Tinley Park mass vaccination site, 18451 Convention Center Drive.
https://cookcountyhealth.org/.../cook-county-health..
Original source can be found here