Three hospital workers test negative.

Despite contact, and some confusion over whether they were or were not wearing personal protective equipment, they are H7N9 negative. So the upper respiratory tract infections (UTRIs; acute signs and symptoms including headache, perhaps a temperature, runny nose, sneezing, cough etc) they manifested after being in contact are due to another virus. Might be interesting to know which one(s). 

Presumably Taiwan already screens for whatever it is as part of a standard "respiratory virus panel". Thanks to ClaireW for the link.