Infant breath collector

A breath collection apparatus is provided that includes a facemask to cover the nose and mouth of a patient to direct the breath into a collection bag or collection vial. A valve assembly containing a flexible valve member is provided between the facemask and the collection container to direct a breath sample to the collection container while permitting fresh air to enter the facemask upon inhalation. Between the valve assembly and the collection container is a collection container attachment fitting for engaging the valve assembly with the collection container. The collection container attachment fitting can be a two-piece fitting designed to accommodate a flexible bladder used to accumulate multiple breath samples for subsequent delivery to the collection container.