The sign outside the Giant Food Store in Flourtown advises shoppers that masks are no longer required for fully vaccinated customers, in accordance with guidance from the Centers for Disease Control and Prevention. But that didn’t stop Canace Sforza, 31, a stay-at-home mother with two children, ages 3 and 5, from donning one. “I am fully vaccinated, but I just think it’s been such an up and .