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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 29: India's tally of COVID-19 cases has reached 31,332, said the Union Ministry of Health and Family Welfare on Wednesday. With 73 more deaths reported, the number of deaths due to coronavirus in the country breached the 1,000 mark and stood at 1,007.

The tally is inclusive of 22,629 active coronavirus cases, 7,695 patients who have been cured/discharged and one patient migrated.

According to the Ministry, Maharashtra has the most number of COVID-19 cases with 9,318 cases of which, 1,388 patients have been cured/discharged while 400 patients have succumbed to the virus.

Gujarat has the second-highest number of positive cases in the country with 3744 cases including 434 patients cured/discharged and 181 deaths.

Delhi's tally stands at 3314 cases of which, 1078 patients have recovered while 54 patients have succumbed to the virus.

Madhya Pradesh has a total of 2387 positive cases including 377 patients recovered/discharged and 120 fatalities.

Meanwhile, Goa (seven cases; all seven recovered), Arunachal Pradesh (one case; now recovered), Manipur (two cases; both recovered), Tripura (two cases; both recovered) have reported no new cases of COVID-19.

New Delhi, Jul 20: India's COVID-19 case tally crossed the 11 lakh mark with the highest single-day spike of 40,425 new cases and 681 deaths reported in the last 24 hours, informed the Union Health and Family Welfare Ministry on Monday.

Total cases in the country now stand at 11,18,043 while the death toll is 27,497.
The Health Ministry said the total number of cases includes 3,90,459 active cases and 7,00,087 patients have been cured/discharged/migrated.

Maharashtra remains the worst affected state with 3,10,455 cases reported until Sunday.
Meanwhile, as per the information provided by the Indian Council of Medical Research (ICMR), 1,40,47,908 samples have been tested for COVID-19 till July 19, of these 2,56,039 samples were tested yesterday.