What action did Taiwan take upon discovering its first case of Coronavirus?

Taiwan took prompt action upon discovering its first case of Coronavirus by banning arrivals from Wuhan, which was identified as the initial epicenter of the outbreak. This decision was critical because it targeted the source of the virus and helped to prevent further spread into Taiwan. By implementing this travel restriction early on, Taiwan aimed to protect public health and contain the potential outbreak before it could escalate. The move highlighted the importance of swift governmental response in managing infectious diseases, especially when they are emerging in other regions.

The other choices suggest measures that either did not occur as a first response or were broader than necessary at that stage in the outbreak. For example, closing all borders or banning travelers from Europe would have been more excessive and potentially harmful to trade and travel, while restricting travel within Taiwan would not specifically address the direct risk posed by arrivals from Wuhan.