Crucially, R0 is not a fixed number. It's a jumping off point that's influenced by many factors, including human behavior.
Pronounced"R-naught," the reproductive number is an indicator of how contagious a disease is, or how easily it spreads from person to person in a community. The number is important because government leaders are using R0 as a proxy for determining whether their respective COVID-19 outbreaks are growing, shrinking and or holding steady.
People relax in circles marked on the grass for proper social distancing at Brooklyn's Domino Park during the coronavirus outbreak, May 18, 2020, in New York. The circles were added after the park, which offers excellent views of the Williamsburg Bridge and the Manhattan skyline, became severely overcrowded during a spate of warm weather.The reproductive number of a virus, or R0, is the number of people, on average, that one infected person will subsequently infect.
And while R0=1 and R0=2 might seem close,"the difference between a reproductive number of 1 and a reproductive number of 2 is huge, in terms of the number of people who will ultimately be infected," Emily Gurley, an associate scientist at Johns Hopkins Bloomberg School of Public Health explained during an"Everything we can do to help us get the reproductive number closer to 1 will help us control the spread of a disease," Gurley added.
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