When the Illinois Department of Public Health (IDPH) says that it is fully adopting the Centers for Disease Control and Prevention’s (CDC) new masking guidelines, it's a pretty safe bet that others will follow suit.
When there's enough talk about disallowing people who are unvaccinated against COVID-19 access to airplanes, trains, buses, schools, universities, etc., it should come as no surprise that fake certificates are available for a price.
While Governor Pritzker and his administration are saying "Hey! Get yourself vaccinated against COVID-19 and you could win a pile of money in a vax lottery," The University of Illinois is saying "You want to be a student here? Get vaccinated."