Don't believe everything you see on the internet...or portal. By all means, wear a mask whenever you leave your home. At Mayo Rochester, patients and caregivers alike are required to wear masks in treatment/exam rooms. Nurses and the entire staff wear masks all the time, even tho they have "self-tested" before coming to work and once during the day. I find that to be more accurate on the mask question than anything else. And good luck with the CART-T. My wife is in day 4 and so far, no side effects except extreme fatigue, which could be the result of nadar from chemo on days -5.-4 and -3.