That estimate was made by the University of Washington and was repeated by Tom Frieden, who led the CDC under President Barack Obama.
The President's advisers haven't used this estimate of 100,000 lives as claimed by former Vice President Joe Biden. A modeling study by the University of Washington estimated that if most Americans wore masks, it could save 100,000 lives by the end of the year. That estimate has been repeated by Tom Frieden, who led the CDC under President Barack Obama. Dr. Robert Redfield, the current head of the CDC under Trump, has not made such a statement. Although he has strongly recommended wearing masks.