By Phil Lawler, Catholic Culture - If you have been wearing a mask for the past several months, your immune system has not been getting its usual daily workout. That’s probably OK for adults, who over the years have developed immunities to all sorts of minor airborne maladies. But young children are in a different situation; their immune systems are still developing. For them, wearing masks for the better part of a year might mean missing opportunities to develop immunity to some pesky diseases.