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New Delhi, Fevb 10: Of the countries most at risk of importing coronavirus cases, India ranks 17th, researchers have found on the basis of a mathematical model for the expected global spread of the virus that originated in China's Wuhan area in December 2019.

So far, India has reported three coronavirus positive cases -- all from Kerala.

Among the airports in India, the Indira Gandhi International Airport in New Delhi is most at risk, followed by airports in Mumbai, Kolkata, Bengaluru, Chennai, Hyderabad and Kochi, according to the model.

The new model for predicting global novel coronavirus cases has been developed by researchers from Humboldt University and Robert Koch Institute in Germany.

"The spread of the virus on an international scale is dominated by air travel," said the study.

"Wuhan, the seventh largest city in China with 11 million residents, was the relevant major domestic air transportation hub with many connecting international flights before the city was effectively quarantined on January 23, 2020, and the Wuhan airport was closed. By then the virus had already spread to other Chinese provinces as well as other countries," it added.

The researchers said that it is possible to estimate how likely it is that the virus spreads to other areas by looking at air travel passenger numbers.

"The busier a flight route, the more probable it is that an infected passenger travels this route. Using these probabilistic concepts, we calculate the relative import risk to other airports. When calculating the import risk, we also take into account connecting flights and travel routes that involve multiple destinations," said the study.

The top 10 countries and regions at risk of importing coronavirus cases are: Thailand, Japan, South Korea, Hong Kong, Taiwan, USA, Vietnam, Malaysia, Singapore and Cambodia, according to the model.

While Thailand's national import risk is 2.1%, it is 0.2% for India, found the research.

The foundation of the model is the worldwide air transportation network (WAN) that connects approximately 4,000 airports with more than 25,000 direct connections.

The model accounts for both, the current distribution of confirmed cases in mainland China as well as airport closures that were implemented as a mitigation strategy.

This network theoretic model is based on the concept of effective distance and is an extension of a model introduced in the 2013 paper "The Hidden Geometry of Complex, Network-Driven Contagion Phenomena" published in the journal Science.

The current outbreak of the 2019-nCoV virus started in Wuhan city, Hubei province, China. While the first cases were reported as early as December 8, 2019, the outbreak gained global attention on December 31, 2019, when the World Health Organization was alerted to "several cases of pneumonia" by an unknown virus.

The new virus was soon identified as a novel coronavirus and named 2019-nCOV. It belongs to the family of viruses that include the common cold and viruses such as SARS and MERS. On January 20, 2020, it was confirmed that the coronavirus can be transmitted between humans, greatly increasing the risk of a global spread.

The death toll due to the novel coronavirus outbreak in China has increased to 811 on Sunday, surpassing that of the Severe Acute Respiratory Syndrome (SARS) epidemic in 2003.

Although about 20 countries have confirmed cases, China has accounted for about 99 per cent of those infected. The first foreign victims of the virus both died on Saturday in Wuhan.

Mumbai, Mar 5: Jet Airways founder Naresh Goyal and few others have been booked by the ED in a money laundering case even as the agency is conducting searches at his premises, officials said on Thursday.

They said a criminal case against the former chairman of the airlines has been filed under the Prevention of Money Laundering Act (PMLA) after taking cognisance of a recent Mumbai Police FIR filed against him.

The Enforcement Directorate carried out raids at Goyal's premises in Mumbai on Wednesday and also questioned him after filing the case, they said.

The action is continuing, they added.

The Mumbai Police FIR pertains to charges of alleged fraud by Goyal and others against a Mumbai-based travel company.

Goyal has earlier been grilled by the central probe agency in a case filed under the Foreign Exchange Management Act (FEMA) in September last year.

The agency had carried out similar raids, under the FEMA, in August last year against Goyal, his family and others.

ED has alleged in the past that the businessman's empire had 19 privately-held companies, five of which were registered abroad.

The agency is probing charges that these firms allegedly carried out “doubtful” transactions under the guise of selling, distribution and operating expenses.

The ED suspects that expenses at these companies were allegedly booked at fake and high costs and as a result, they “projected” huge losses.

Alleged shady aircraft lease transactions with non-existent offshore entities are also under the ED scanner and it is suspected that Jet Airways made payments for lease rental to “ghost firms”, which purportedly routed the ill-gotten money in Goyal's companies.

A full-service carrier, Jet Airways shut its operations in April last year after running out of cash.

A month earlier, Goyal had stepped down as the chairman of Jet Airways.