The Deceptively Simple Number Sparking Coronavirus Fears

The Deceptively Simple Number Sparking Coronavirus Fears

It’s called the basic reproduction number—R0, pronounced R-nought—and though useful for decision makers, it’s a nightmare for public communication. In brief, R0 is the average number of people who will catch the disease from a single infected person, in a population that’s never seen the disease before. If R0 is 3, then on average every case will create three new cases.