Nine of the 12 persons admitted at the isolation ward of a government hospital here were released after they tested negative for the coronavirus, a senior official of the West Bengal health department said on Monday.
Of the remaining three, two tested positive for type-B influenza, while the third person was diagnosed with swine flu, he added.
Five others, who had recently returned to the city, were admitted to the isolation ward of the Beliaghata ID and BG Hospital in the evening, the official said.
A resident of the city's Highland Park area, who had travelled to France, Germany, Finland and Portugal and returned to the city on Sunday, was taken to the isolation ward of the same hospital, he added.
Two men, who returned from Kerala on Sunday, were also admitted to the same ward with COVID-19 symptoms, the official said, adding that another person who returned from Haridwar on Saturday was also kept under observation.
Earlier in the morning, one person with a travel history to Thailand was taken to the isolation ward of the Beliaghata hospital.
Twelve others, who returned to the city in the evening, were taken to the quarantine facility set up at the Chittaranjan National Cancer Institute in Rajarhat.
"All the 12 passengers are Indian nationals who travelled from Dubai and landed at the Netaji Subhas Chandra Bose International Airport in the evening. All of them were sent to the quarantine facility in Rajarhat. The necessary tests will be conducted on them," the official said.
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