Health officials in Illinois have identified Covid-19 cases linked to a 'mini-prom'

a group of stuffed animals sitting next to a teddy bear: This scanning electron microscope image shows SARS-CoV-2 (orange)—also known as 2019-nCoV, the virus that causes COVID-19—isolated from a patient in the U.S., emerging from the surface of cells (green) cultured in the lab. Credit: NIAID-RML