The situation in the state was under control but the state needs to be vigilant, the minister told reporters.
"A total of 633 people are under observation in the state. As of now everything is under control. But we need to remain vigilant until the World Health Organisation says its safe," the minister said.
She asked those who have returned from China or other affected areas like Nepal or Sri Lanka to approach the health department without any hesitation.
"Those who have returned from China should approach the health department and follow the instructions of the officials.It has been learnt that the particular virus will be inactive in the body for a few days initially.
So it is better to stay under observation," the minister said.
Meanwhile, a senior health official told PTI that seven people are in isolation wards.
"Out of the 633 persons who reached the state, seven are in different hospitals-two in Kochi, four in Thrissur and one in Malappuram district.
The rest are home quarantined," the official said.
He also said of the ten samples sent for testing at the National Institute of Virology at Pune, six tested negative for the virus while results of the others are awaited.
A three-member central team on Tuesday held a meeting with Kerala Health authorities, including Principal Health Secretary Dr Rajan N Khobragade, here and discussed the preventive measures taken against the backdrop of the Coronavirus outbreak in China's Wuhan province.
A thermal screening facility was opened at the Thiruvananthapuram airport on Tuesday to scan passengers coming from the neighbouring country, they told reporters.
"So far, no case of coronavirus has been reported in the country. There is nothing to worry about in the state as of now," Union Health and Family Welfare Adviser Dr M K Shoukath Ali, a team member, said.
He also said the NORKA (Non-Resident Keralites Affairs) department has been in constant touch with central government authorities and Keralites in China.