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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.

New Delhi, Apr 27: Prime Minister Narendra Modi on Monday held a video conference with chief ministers to discuss the situation arising due to the coronavirus pandemic in the country, which has been under a lockdown since March 25 to contain the spread of the virus, amid indications that the interaction would also focus on a graded exit from the ongoing lockdown.

This is Modi's fourth such interaction with state chief ministers since March 22 when he discussed coronavirus situation and steps taken both by the Centre and the states to contain the pandemic.

Two days later on March 24, Modi announced a 21-day nationwide lockdown. He extended the lockdown by 19 days on April 14, the last day of the initial three week shutdown, till May 3.

Sources in the government had on Sunday indicated that besides discussing the way forward in dealing with the pandemic, the prime ministers and chief ministers could also focus on a "graded" exit from the lockdown.

In a tweet on Monday, the Prime Minister's Office said Modi and the chief ministers will be discussing aspects relating to the COVID-19 situation.

In his monthly 'Mann ki Baat' radio address on Sunday, the prime minister said the country is in the middle of a 'yudh' (war) and asserted that people have to continue being careful and take precautions.

His note of caution came amidst gradual exemptions being granted by the Centre and states to revive economic activities.

"I urge you not to get overconfident. You should in your over-enthusiasm not think that if the coronavirus has not yet reached your city, village, street or office, it is not going to reach now. Never make such a mistake. The experience of the world tells us a lot in this regard," Modi said while referring to a popular Hindi idiom 'Sawdhani hati, durghatna ghati' (disaster strikes when you lower your concentration).

The Centre and the state governments have been giving gradual exemptions to boost economic activities as also to provide relief to people as some states want further relaxation in areas which have seen few or no coronavirus cases.

Noida, Jul 16: A key aide of 1993 Mumbai blasts case convict Abu Salem who worked in his illegal property business in NCT of Delhi has been arrested by the Special Task Force (STF) of the Uttar Pradesh police, officials said on Thursday.

Gajendra Singh, who was also close to gangster Khan Mubarak, was nabbed in Mumbai late Wednesday night by the Noida unit of the STF, they said.

"Gajendra Singh had taken Rs 1.80 crore from a Delhi-based businessman in 2014 in a property-related case. When he was pressured to return the money, Singh had Khan Mubarak's shooters open fire at the businessman in sector 18 of Noida," Additional Superintendent of Police, STF, Raj Kumar Mishra said.

The businessman was in his car when the attack took place, and he narrowly escaped, the officials said.

Mishra said Singh had paid the shooters Rs 10 lakh, and the agency has cracked the money trail of the transaction.

"Gajendra Singh also invested Abu Salem and Khan Mubarak's money into properties in Delhi-NCR," the officer added.

Singh was wanted in a couple of cases registered at a police station in Noida where he has been lodged now for further proceedings, the STF said.