AdvertisementConfused By CDC's Latest Mask Guidance? Here's What We've LearnedUpdated May 15, 2021Selena Simmons-DuffinfacebookEmailAfter the CDC shifted this week to less restrictive mask guidance for people who have been fully vaccinated against COVID-19, some leaders in the public health world felt blindsided. While some people rejoiced, others say they feel the change has come too soon. (MediaNews Group via Getty Images)This article was originally published on May 14, 2021.