Covid-19: Five days that shaped the outbreak
BBC News - 01/26/2021
Although no-one knew it at the time, between 2,300 and 4,000 people were by now likely infected, according to a recent model by MOBS Lab at Northeastern University in Boston. The outbreak was also thought to be doubling in size every few days. Epidemiologists say that at this early part of an outbreak, each day and even each hour is critical.