Mucus.
Non-adolescents generally don’t think much about it until they’re suffering from allergies or a cold. For most people, you might say, ‘snot a big deal.
But a layer of protective mucus in sensitive bodily tissues plays a critical role in keeping our bodies healthy. People who have mucosal surface deficiencies suffer from conditions ranging from dry eye disease to life-threatening pulmonary diseases, including cystic fibrosis (CF), chronic obstructive pulmonary disease, and idiopathic pulmonary fibrosis.