David Krupp isn’t getting very much sleep these days.“I’ve been getting maybe four hours of sleep a night just trying to get all these endeavors taken care of,” he said. “His impact goes beyond working as an Iowa City emergency room doctor in the midst of a pandemic. In his spare time — aside from those four hours of precious sleep — he developed a way for hundreds of businesses to show they’re being “COVID-conscious.”The initiative — free for businesses to join — is a way of showing customers the company is prioritizing their safety.“I was trying to bring about some social change, not just in the ER,” Krupp said.