Latest development on COVID-19 cases worldwide: More 'firsts' in deaths and infections

In less than 12 hours, three countries – Thailand, Australia and the U.S. have each reported their first death from the novel coronavirus on their soil.

South Korea's surge: On Monday afternoon, South Korea said an 18th person died from the virus. The country's total number is at 3,526, the biggest outside China.

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South Korea reports 376 more virus cases, totaling 3,526

There are several other countries reporting their first infection case as of late Saturday and Sunday:

Armenia: A 29-year-old Armenian citizen returned from neighboring Iran. The patient is in stable condition now and those who had been in contact with him are expected to be isolated.

Ecuador: An Ecuadorian woman in her 70s who returned from Spain on February 14. She had pre-existing medical conditions and is in "intensive care."

Luxembourg: A man in his 40s who recently returned from Italy. The patient was isolated in a Luxembourg hospital and his family members were quarantined.

Ireland: A man who had returned from northern Italy.

Qatar: A 36-year-old Qatarian who recently returned from Iran. He is in stable condition.