hurricane maria also disrupted production at puerto rican factories that make critical drugs and medical supplies. dr. jon lapook found hospitals on the u.s. mainland are already seeing shortages. >> this is slated to go to a patient for infusion. >> reporter: these small bags of intravenous fluid deliver life-saving medications like antibiotics and chemotherapy. regine villain's job at nyu health is to manage supply, and she's worried. the bags are in short supply. >> we have been practically hand-to-mouth counting by the thops how much we have in house. it's just really nerve-racking to think about not being able to have those bags available for the patients. >> reporter: her concern is pihoed by hospitals and pharmacists around the country. ae american hospital association told cbs news the shortage is quickly becoming a crisis and threat to public health. there was already an existing xiortage for several years, made worse by facilities being