The Illinois Department of Public Health has a limited supply of RSV Vaccine that is being distributed to County Health Departments. 

Babies and the elderly are those most in need of an RSV Vaccination and local health departments are working hard to encourage vaccination for those vulnerable populations. RaeAnn Tucker is with the Henry and Stark County Health Department in Central Illinois...

There is a limited supply for local health departments but your so called big box stores with there own pharmacies can also provide the RSV vaccine for those in need.