On February 20, 2020, the Central Epidemic Command Center (CECC) indicated that the number of cases of coronavirus disease 2019 (COVID-19) is rapidly growing in Seoul, and the current cumulative total has exceeded 80. Moreover, 70% of the cases had contacted or suspected of contracting COVID-19 locally. Of these cases, the source of infection of six cases had not been identified. Furthermore, clusters of cases have been reported in South Korea. Considering the frequent social exchanges between Taiwan and South Korea, the CECC announced that the travel notice level for South Korea has been raised to Level 1: Watch, and the public is advised to practice usual precautions.