Taiwan said on Saturday that six people suffering from fever have so far been placed under medical observation after arriving on the island on flights from the mainland city of Wuhan.
The Centers for Disease Control said enhanced temperature screening had been carried out on more than 600 passengers on several flights from Wuhan since New Year's Eve.
Two were later diagnosed with flu and one with a common cold, while a fourth person's symptoms disappeared, the Central News Agency reported.
It said the other two people were still being monitored by health officials.
Taiwan was considering additional preventative measures in light of the outbreak of a mystery viral pneumonia in Wuhan which has infected at least 44 people.
The extra steps could include an "outbreak command centre", the news agency said.
Hong Kong has introduced its own measures in response to the outbreak, including increased medical surveillance at the city's border crossings and reduced patient visitor times at public hospitals.
Several people have been placed in isolation in Hong Kong after suffering respiratory infections following recent trips to Wuhan.
Taiwan monitors six over Wuhan pneumonia fears
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