What considerations are there for businesses that have most, if not all, of their staff vaccinated? “What’s really important is that we’re still learning a lot about the vaccine,” Wineland said. “We know that it’s almost 100% preventable in serious illness, hospitalizations and death. “What we also know is that people who are fully vaccinated still contract the virus. They still might have mild illness, and they might spread the virus. What role vaccinated people play in the continued spread of this virus we are still learning. … It is really critical that even people who have been vaccinated continue to wear that mask until we reach a high level of protection within our population.”