Masks seem to be working to fight the virus, even as some refuse them and US deaths near 100,000

(CNN)Americans are at odds over whether it’s necessary to keep taking coronavirus protective measures, but a leading researcher says the data is clear: The path ahead in the Covid-19 pandemic is being shaped by masks.

“We now have really clear evidence that wearing masks works — it’s probably a 50% protection against transmission,” Dr. Chris Murray, director of the Institute for Health Metrics and Evaluation, or IHME, at the University of Washington, told CNN late Tuesday.