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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, Jul 10: With the highest single-day spike of 26,506 COVID-19 cases and 475 deaths reported in the last 24 hours, the total number of COVID-19 cases in India reached 7,93,802 on Friday, according to the Union Ministry of Health and Family Welfare.

Out of the total number of cases, 2,76,685 are active, 4,95,513 have been cured/discharged/migrated and 21,604 have died so far due to the infection.

With as many as 2,30,599 COVID-19 cases, Maharashtra continues to remain the worst-affected state, followed by Tamil Nadu (1,26,581) and Delhi (1,07,051).

Meanwhile, 2,83,659 samples were tested for coronavirus on Thursday, taking the total number of samples tested up to July 9 to 1,10,24,491, according to the Indian Council of Medical Research (ICMR).

New Delhi, Jul 18: With 34,884 people testing positive for coronavirus in the last 24 hours, India's Covid-19 caseload surged to 10,38,716 while 6,53,750 patients have recovered from the disease so far, according to data by the Union Health Ministry.

The death toll due to Covid-19 rose to 26,273 with 671 fatalities reported in a day, the data updated at 8 am on Saturday showed.

At present, there are 3,58,692 active cases in the country, while 6,53,750 people have recovered so far and one has migrated.

"Around 62.94 per cent of patients have recovered so far," an official said.

The total number of confirmed cases includes foreigners.

This is the third consecutive day when the number of Covid-19 cases increased by more than 30,000.

According to the Indian Council of Medical Research (ICMR), a cumulative total of 1,34,33,742 samples have been tested for COVID-19 up to July 17 with 3,61,024 samples being tested on Friday.

Of the 671 deaths reported in the last 24 hours, 258 are from Maharashtra, 115 from Karnataka, 79 from Tamil Nadu, 42 from Andhra Pradesh, 38 from Uttar Pradesh, 26 each from West Bengal and Delhi, 17 from Gujarat, nine each from Jammu and Kashmir and Punjab, and eight each from Madhya Pradesh and Rajasthan.

Telangana has reported seven fatalities followed by Haryana with five deaths, Jharkhand, Bihar and Odisha reported four each, Assam and Puducherry have registered three each, Chhattisgarh and Goa reported two each while Kerala and Uttarakhand have registered a fatality each.

Of the total 26,273 deaths reported so far, Maharashtra accounted for the highest 11,452 fatalities followed by Delhi with 3,571 deaths, Tamil Nadu 2,315, Gujarat 2,106, Karnataka 1,147, Uttar Pradesh 1,084, West Bengal 1,049, Madhya Pradesh 697 and Rajasthan 546.

So far 534 people have died of COVID-19 in Andhra Pradesh, 403 in Telangana, 327 in Haryana, 239 in Punjab, 231 in Jammu and Kashmir, 201 in Bihar, 83 in Odisha, 51 in Uttarakhand and Assam each, 46 in Jharkhand and 38 in Kerala.

Puducherry has registered 25 deaths, Chhattisgarh 23, Goa 21, Himachal Pradesh and Chandigarh 11 each, Arunachal Pradesh and Tripura three each, Meghalaya and Dadra and Nagar Haveli and Daman and Diu two each while Ladakh has reported one fatality.

The Health Ministry stressed that more than 70 per cent of the deaths occurred due to comorbidities.

Maharashtra has reported the highest number of cases at 2,92,589 followed by Tamil Nadu at 1,60,907, Delhi at 1,20,107, Karnataka at 55,115, Gujarat at 46,430, Uttar Pradesh at 45,163 and Telangana at 42,496.

The number of Covid-19 cases has gone up to 40,646 in Andhra Pradesh, 38,011 in West Bengal, 27,789 in Rajasthan, 24,797 in Haryana, 23,589 in Bihar and 21,081 in Madhya Pradesh.

Assam has instances of 20,646 infections, Odisha 16,110 and Jammu and Kashmir 12,757 cases. Kerala has reported 11,066 novel coronavirus infections so far, while Punjab has 9,442 cases.

A total of 4,964 have been infected by the virus in Chhattisgarh, 4,921 in Jharkhand, 4,102 in Uttarakhand, 3,304 in Goa, 2,366 in Tripura, 1,832 in Puducherry, 1,800 in Manipur, 1,417 in Himachal Pradesh and 1,151 in Ladakh.

Nagaland has recorded 956 Covid-19 cases, Chandigarh 660, Arunachal Pradesh 609 and Dadra and Nagar Haveli and Daman and Diu together have reported 585 cases.

Meghalaya has reported 403 cases, Mizoram 282, Sikkim has registered 266 infections so far, while Andaman and Nicobar Islands has recorded 194 cases.

"Our figures are being reconciled with the ICMR," the ministry said, adding that 163 cases are being reassigned to states.

State-wise distribution is subject to further verification and reconciliation, it added.