Except for initial hot spots like New York City, many ERs across the U.S. were often eerily empty in the spring of 2020. Terrified of contracting COVID-19, people who were sick with other things did their best to stay away from hospitals. Visits to emergency departments dropped to half their normal levels, according to the Epic Health Research Network, and didn't fully rebound until the summer of 2021. But now, they're too full. Even in parts of the country where COVID-19 isn't overwhelming the health system, patients are showing up to the ER sicker than they were before the pandemic, their diseases more advanced and in need of more complicated care. Months of treatment delays have exacerbated chronic conditions and worsened symptoms. Doctors and nurses say the severity of illness ranges widely and includes abdominal pain, respiratory problems, blood clots, heart conditions and suicide attempts, among others. But there's nowhere to put them all. Although the number of ER visits returned to pre-coronavirus levels this past summer, admission rates, from the ER to the hospital's inpatient floors, are still almost 20% higher. Less acute cases, such as people suffering from health issues like rashes or conjunctivitis, still aren't going to the ER as much as they used to. Instead, they may be opting for an urgent care center or their primary care doctor. Meanwhile, there has been an increase in people coming to the ER with more serious conditions, like strokes and heart attacks.