Clouds do prevent radars from detecting accurately: Air Marshal Raghunath Nambiar

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, Jun 7: Rain lashed some parts of the Delhi-NCR on Sunday morning.

The India Meteorological Department (IMD) has predicted partly cloudy sky with possibility of development of thunder lightning for three days from June 10 onwards with minimum and maximum temperature will hover around 29° Celcius and 42° Celcius respectively.

Strong surface winds during day time have been predicted for today by IMD.

New Delhi, Jan 10: The Supreme Court while hearing petitions challenging restrictions in Jammu and Kashmir on Friday stated that the right to access the internet is a fundamental right under Article 19 of the Constitution of India.

"It is no doubt that freedom of speech is an essential tool in a democratic setup. The freedom of Internet access is a fundamental right under Article 19(1)(a) of the Constitution," a two-judge bench headed by Justice N V Ramana stated while reading out the judgment.

The top court said that Kashmir has seen a lot of violence and that it will try to maintain a balance between human rights and freedoms with the issue of security.

It also directed the Jammu and Kashmir administration to review the restrictive orders imposed in the region within a week. “The citizens should be provided highest security and liberty,” the apex court added.

The top court made observations and issued directions while pronouncing the verdict on a number of petitions challenging the restrictions and internet blockade imposed in Jammu and Kashmir after the abrogation of Article 370 in August last year.

The Supreme Court had on November 27 reserved the judgment on a batch of petitions challenging restrictions imposed on communication, media and telephone services in Jammu and Kashmir pursuant to revocation of Article 370.

The court heard the petitions filed by various petitioners including Congress leader Ghulam Nabi Azad and Kashmir Times editor Anuradha Bhasin.

The petitions were filed after the central government scrapped Article 370 in August and bifurcated Jammu and Kashmir into two Union Territories -- Jammu and Kashmir and Ladakh. Following this, phone lines and the internet were blocked in the region.

The government had, however, contended that it has progressively eased restrictions.