Gene Editing Researchers show how face shape influences the most ideal fit of masks Posted on May 4, 2022 by Editorial Staff In its updated guidance at the start of 2022, the U.S. Centers for Disease Control and Prevention said loosely woven cloth masks offer the least protection against COVID-19, and N95 and KN95 masks offer the most protection. Share on FacebookTweetFollow us Editorial Staff Researchers create models to study brain metastases that recapitulate the disease Endocrine-disrupting chemicals may be linked with lower bone mineral density in male teens