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New Delhi, Mar 27: Cabinet Secretary Rajiv Gauba has asked states to urgently strengthen the surveillance of international travellers who entered the country before the lockdown as there appeared to be a "gap" between the actual monitoring for COVID-19 and the total arrivals.

In a letter to chief secretaries of all States and Union Territories, Gauba said such a gap in monitoring of international passengers for coronavirus "may seriously jeopardise the efforts to contain the spread of COVID-19", given that many amongst the persons who have tested positive so far in India have history of international travel.

"As you are aware, we initiated screening of international incoming passengers at the airports with effect from January 18, 2020. I have been informed that up to March 23, 2020, cumulatively, Bureau Of Immigration has shared details of more than 15 lakh incoming international passengers with the States/UTs for monitoring for COVID-19.

"However, there appears to be a gap between the number of international passengers who need to be monitored by the States/UTs and the actual number of passengers being monitored," Gauba said in his letter.

The government had started monitoring of all international passengers who have arrived in India in last two months in the wake of the coronavirus outbreak.

Gauba said,"it is important that all international passengers are put under close surveillance to prevent the spread of the epidemic."

He said the Ministry of Health and Family Welfare (MoHFW) has repeatedly emphasised the importance of monitoring, and requested the states and UTs to take immediate steps in this regard.

"I would, therefore, like to request you to ensure that concerted and sustained action is taken urgently to put such passengers under surveillance immediately as per MoHFW guidelines," he said.

The cabinet secretary also urged the chief secretaries to actively involve the district authorities in this effort.The screening of international incoming passengers at airports was done from January 18 in a phased manner.

The Central and state governments have unleashed unprecedented and extraordinary measures to contain the spread of the fast-spreading coronavirus, which has already infected more than 700 people in the country and claimed at least 17 lives.

A nationwide lockdown was also announced by Prime Minister Narendra Modi on Tuesday for 21 days.

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.

Lucknow, May 3:Holding the Tablighi Jamaat responsible for the spread of COVID-19, Uttar Pradesh Chief Minister Yogi Adityanath on Saturday said that being infected with a virus is not a crime but to hide it is definitely a crime.

Speaking at a programme of a news channel, Adityanath said, "The role of Tablighi Jamaat was most condemnable. To get a disease is not a crime but to hide a disease which is infectious is definitely a crime. And this crime has been done by those associated with the Tablighi Jamaat."

"In Uttar Pradesh and other places where the spread of the coronavirus has been seen, Tablighi Jamaat is behind it. Had they not hidden the disease and went about like its carriers, then perhaps we would have controlled the coronavirus outbreak to a large extend," he said.

The chief minister said action would be taken against them for the "crime that they have committed".

A Tablighi Jamaat congregation in Delhi in March turned out to be a major source of COVID-19 cases, with those who attended the meet returned home in different parts of the country after being infected with the deadly virus.