1. A computer-implemented method to guide a dispatcher when communicating vocally with a caller via a communication device regarding a medical emergency involving a patient manifesting symptoms of a pandemic illness and for dispatching an emergency response by emergency responders, the computer-implemented method comprising: presenting on a dispatch center computer device a pre-scripted interrogation comprising a plurality of preprogrammed inquiries for the dispatcher to ask the caller to systematically obtain a description of the medical emergency including information concerning symptoms of the pandemic illness that the patient is manifesting, the description of the medical emergency comprising caller responses to the plurality of preprogrammed inquiries, wherein the dispatch center computer device includes a logic tree configured to determine the preprogrammed inquiries of the pre-scripted interrogation and automatically determine one of a plurality of pre-established determinant values based on dispatcher-entered input representative of caller responses to the preprogrammed inquires; receiving dispatcher-entered input on the dispatch center computer device representative of caller responses to the preprogrammed inquiries of the pre-scripted interrogation; assigning on the dispatch center computer device the pre-established determinant value determined by the logic tree and the pre-scripted interrogation; and generating an emergency medical dispatch response by emergency responders based on the assigned pre-established determinant value.