When looking at how infections spread, scientists have taken into consideration all environmental and biological factors and come up with a number called R0.
원문출처 : https://www.cnn.com/videos/health/2020/03/03/how-viruses-spread-lon-md-orig.cnn
원문출처 : https://www.cnn.com/videos/health/2020/03/03/how-viruses-spread-lon-md-orig.cnn