CHICAGO — Chicago’s COVID-19 risk level has risen from “low” to “medium” for the first time since last January. The heightened warning, spurred by a jump in hospitalizations, shows the virus’s spread “is creeping up,” said Dr. Alex Sloboda, medical director of immunization and emergency preparedness programs with the Chicago Department of Public Health. “COVID-19 is still with us,” Sloboda told the Chicago Tribune on Thursday. “We’ve seen it has the potential to be significant, severe and make people ill. We have a solution to all this: the vaccination.” Over the last week, 30 people per day h…