CHICAGO (CBS) — With more businesses opening up, there is a renewed push to get more people vaccinated for COVID-19.

In communities such as Pilsen, vaccine ambassadors are taking the time to talk to small groups of people to address their concerns.

READ MORE: CDC Approves Pfizer Booster Shots For Seniors, Others At Increased Risk From COVID-19

Vaccine ambassador Carlos Millan said there is a reason for hesitancy in Black and Brown communities.

READ MORE: Fourth Stimulus Check: Is Another Relief Payment Coming?

“We’ve been underserved for so long that we are skeptical comes are way,” Millan said. “When something great for our community comes, we are skeptical.”

MORE NEWS: Jury Begins Deliberations In R. Kelly Trial After 6 Weeks Of Testimony

So far, about 1,600 people have signed up for training as ambassadors.

CBS 2 Chicago Staff