Nearly 300,000 Americans could be dead from Covid-19 by Dec. 1, University of Washington health experts forecast, although they said 70,000 lives could be saved if people were scrupulous about wearing masks.

University of Washington researchers estimated that 145,728 people could die of COVID-19 in the United States by August 2020.

The U.S. death toll from the coronavirus outbreak could exceed 74,000 by August, according to the University of Washington’s predictive model, often cited by White House officials and state public health authorities.

Better-than-expected social distancing practices have led an influential research model to lower the projected U.S. coronavirus death toll by 12 percent, while predicting some states may be able to safely begin easing restrictions as early as May 4.