let's bring in dr amesh adalja. he is an infection disease physician from the university of pittsburgh medical center. >> thanks for having me. >> who is responsible for this problem? >> i think the health care industry is responsible, not justifiesicians, but patients -- not just firstitions but patients, people asking for antibiotics whether or not it merits it. common colds - people often have an antibiotic prescription whether necessary. in hospitals it's a different story. this is what the c d.c. focuses on. >> patients are diagnosing themselves, is that what we are saying. >> there's two facets. the outpatient, whereas fizzitions are faced with patients and they are saying "we want to have antibodies , because that may make us better and physicians feel pressure to prescribe them. this study focussed on inpatients in hospitals and how they are prescribed in hospitals and it found a great proportion of those prescribed were prescribed incorrectly and were not necessary. >> why is that? >> i think it's because p