US Immigration from Denmark

My husband's finally recently got rescheduled for a new interview after the last one was cancelled due to COVID. Now, I'm finishing preparing the last of the documents, including the DS5540. Under Part 4, question 12, do we answer "No" or leave it blank? We have never received public benefits, but the question is "If you or your family requested or received a public benefit, were you or your family members exempt from public charge during that period?" so I'm not sure if we should leave it blank or not. Also, my husband has an outstanding hospital bill from last time he visited (nothing serious he is completely OK he wasn't feeling well and we didn't want to risk anything, urgent cares weren't open so we went to ER because we didn't want to wait till morning), would that go under debts?