Scientists are baffled by the virus which has never been seen before. No additional cases have been detected since January 3 in China.
The work of the World Health Organization and the Chinese authorities in containing the new coronavirus will be made more complicated by the Spring Festival, also known as the Chinese New Year, which begins on January 25, and sees hundreds of millions criss-crossing the country. Kyodo News agency says the patient is Chinese.
She echoed Wuhan authorities' assertion that there remains no definitive evidence of human-to-human transmission. With all this happening inside the Chinese borders, unexpected cases broke out outside China too.
The woman - who has not been named - was quarantined after landing in Bangkok from Wuhan. Around 44 suspected cases were reported in the month of December.
Coronaviruses are a large family of viruses that cause illness ranging from the common cold to more severe diseases such as Middle East Respiratory Syndrome (MERS-CoV) and Severe Acute Respiratory Syndrome (SARS-CoV), according to the WHO.
Vietnamese news service VN Express reported Thursday a 22-year-old man and a 3-year-old boy are undergoing testing for the new coronavirus.
The Thai Health Ministry said on Monday that of 12 passengers quarantined since January 3, lab results show that a 61-year-old Chinese woman carried a strain of the coronavirus.
The man had returned from a visit to Wuhan, where, according to local authorities, dozens of Chinese vendors at Huanan Seafood Wholesale Market were hospitalized after exhibiting severe respiratory problems. The city is home to 11million people.
Still, WHO said it is preparing for the possibility of a wider outbreak.
Many earlier cases of the virus had reportedly been linked to a fish market in Wuhan.
The WHO said the patient is in a stable condition and her full exposure history is still under investigation. With this spread likely to advance, the World Health Organization may soon consult with the emergency committee members to could call meeting.
Thai health officials are stepping up monitoring and inspection at its airports for the new mystery virus from China ahead of Lunar New Year, when Chinese visitors flock to the Southeast Asian country, a health official said on Wednesday.