Almost all the suspected cases of coronavirus from Agra and the National Capital Region can be traced back to one confirmed case from Delhi.The patient, who arrived from Vienna on February 25, undertook a trip to Agra shortly after, where he met six family members. Everyone has now been put under quarantine at Delhi's Safdurjung Hospital.The health ministry on Tuesday said these six cases depicted a “high viral load” during sample testing in Agra. The samples have now been sent to the National Institute of Virology (NIV) in Pune for further examination.Meanwhile, Prime Minister Narendra Modi on Tuesday reviewed the preparedness level in containing the outbreak and treatment. “Different ministries and states are working together — from screening people arriving in India to providing prompt medical attention,” he tweeted after a meeting with the Cabinet Secretary and other officials.The health ministry is also using its Integrated Disease Surveillance Programme (IDSP) network to trace people who may have come in contact with the six persons isolated at Safdarjung Hospital.It is learnt that the patient, a resident of Mayur Vihar, attended a birthday party along with his child at Hotel Hyatt Regency. two schools in Noida — where children who were present at the party study — have decided to shut down for three days as a precautionary measure. School premises and buses have been fumigated and sanitised, said a school representative.“The patient also dined at the restaurant at Hyatt Regency last Friday. The hotel has now asked employees who were present at the restaurant to self-quarantine for two weeks. The hotel is also conducting daily temperature checks for all its employees and contractors when they enter and exit the building,” said Julian Avers, general manager, Hyatt Regency, Delhi.JAIPUR CASE TESTS POSITIVEThe ministry also confirmed another case of Covid-19 — an Italian national in Jaipur. Some 24 people who were in contact with him have been quarantined.Of these, 21 were Italian tourists, while three Indians aboard their bus were the driver, conductor and a tour guide. All have been quarantined to an Indo-Tibetan Border Police facility, and their samples have been sent for testing.