the failure to reply to something; the absence of a reply
non-response is a big concern with this type of survey
some observers will perceive a non-response as an admission of guilt
the condition of not responding, or not responding satisfactorily, to a drug, therapy, or other treatment
non-response is predicted by a lack of symptom improvement during the first 14 days of therapy
a marker associated with non-response to hepatitis B vaccination