Effective immediately from 3 March 2020, anyone travelling from Mainland China, Hong Kong, Macau, Korea and Italy in the past 21 days will not be allowed into Nauru.
According to the Ministry of Health and Medical Services, the travel restriction and measures will remain in place until a new issuance.
The World Health Organisation reports more than 93,000 people have been infected in more than 80 countries.
Four new Member States (Argentina, Chile, Poland and Ukraine) have reported cases of COVID-19 in the past 24 hours.