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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, May 11: Former prime minister Manmohan Singh is stable and under observation at the AIIMS here after suffering reaction to a new medication and developing fever, hospital sources said on Monday.

The 87-year-old Congress leader was admitted to the hospital on Sunday evening after he complained of uneasiness. He has now been shifted out of the ICU.

The sources said that Singh had developed a reaction to a new medication and further investigation is being carried on him to rule out other causes of fever.

"Dr Manmohan Singh was admitted for observation and investigation after he developed a febrile reaction to a new medication," the sources said.

"He is being investigated to rule out other causes of fever and is being provided care as needed. He is stable and under care of a team of doctors at the Cardiothoracic Centre of AIIMS," they said.

"All his parameters are fine. He is under observation at the AIIMS," a source close to him has said.

Singh, a senior leader of the opposition Congress, is currently a Member of Rajya Sabha from Rajasthan. He was the prime minister between 2004 and 2014.

In 2009, Singh underwent a successful coronary bypass surgery at the AIIMS. A number of leaders expressed have expressed concern over his health and wished him a speedy recovery.

New Delhi, Apr 11: With 40 deaths and 1,035 new COVID-19 cases in the last 24 hours, India on Saturday witnessed a sharpest ever increase in coronavirus cases, taking the tally of the infected people in the country to 7,447, as per the Ministry of Health and Family Welfare on Saturday.

According to the official data, among 7447 COVID-19 positive cases, 6,565 are active cases and 643 are cured, discharged and migrated and 239 patients who have succumbed to the virus.

Maharashtra has reported the highest number of cases in the country which stands at 1,574, including 188 cured and discharged and 110 deaths, followed by Tamil Nadu with 911 corona positive cases.

On the other hand, the national capital has reported 903 cases, which include 25 recovered cases and 13 deaths.

While 553 have detected positive for the infection in Rajasthan, Telangana has 473 corona cases and Chhattisgarh and Chandigarh have reported 18 cases each.

Uttar Pradesh and Haryana, that borders the national capital, has 431 and 177 cases, respectively.
Kerala, which reported India's first coronavirus case, has 364 confirmed cases.

The newly carved union territories -- Ladakh and Jammu and Kashmir--- have 15 and 207 cases, respectively.

The least number of COVID-19 cases have reported from the northeast region of the country. While Arunachal Pradesh, Mizoram, and Tripura have only 1 corona positive case, Assam has 29 people infected with the virus, which is the highest in the region.