Arecently retired man appears at his doctor's office complaining of difficulty breathing, body aches and fatigue. he is also running a high fever and has a dry cough. he reports having just returned from a trip to the middle east where he visited several historical sites. test results are negative for a rapid test for influenza a. no bacteria are visible in a microscopic exam of his sputum. which of the following is a likely explanation?
a) pertussis
b) inhalation anthrax
c) valley fever
d) primary atypical pneumonia
e) coronavirus respiratory syndrome