Early symptoms are fever, muscle pain and weakness, and sore throat.

These symptoms apply to several infections. Norwalk type viruses are common, and have similar symptoms; spread commonly by hand contact or contact with contaminated surfaces.
Enterovirus D-68 is current in parts of U. S. and Canada; muscle weakness a symptom. A big problem in Alberta and my city of Calgary at the moment.

Health care workers are faced with identification of the patient's disease, and of course the more common ones are the first guess- isolation and special protective measures cannot be extended to each patient, so blaming the health care worker in Texas for the late treatment for Ebola is wrong- unless the history of the movements of the patient and his African contacts was available at the first contact with the patient.