COVID-19 infections in U.S. may be much higher, new estimates show

By March 1, 2020, thousands of people in the U.S. may have already been infected by the COVID-19 coronavirus, far more than the number that had been publicly reported, according to a new study. However, the findings also suggest that even moderately effective interventions to reduce transmission can have a significant impact on the scale of the epidemic, the authors say.