Despite multiple air samples
none of the air samples contained any detectable adenovirus DNA
Despite multiple air samples taken on difference days , coinciding with high levels of adenovirus detectable in the child 's nasopharyngeal aspirates ( NPAs ) , none of the air samples contained any detectable adenovirus DNA using a clinically validated diagnostic polymerase chain reaction ( PCR ) assay .
Despite multiple air samples taken on difference days , coinciding with high levels of adenovirus detectable in the child 's nasopharyngeal aspirates ( NPAs ) , none of the air samples contained any detectable adenovirus DNA using a clinically validated diagnostic polymerase chain reaction ( PCR ) assay .