New variants of COVID-19 prompt fresh guidance on masks
With new variants of COVID-19 emerging, some experts say it's time to upgrade the masks you wear, or start to wear two layers. We talk to Dr. Abraar Karan, an internal medicine doctor at the Brigham and Women's Hospital and Harvard Medical School, about the advantages of different types of masks. And we discuss manufacturing challenges with Steve Mai, CEO of Eclipse Automation, a manufacturing company making medical-grade respirators in Cambridge Ont.; and Ravi Selvaganapathy, director of the Centre of Excellence in Protective Equipment and Materials at McMaster University.