Green shoots: Manufacturing PMI expands to 8-year high of 55.3 in January

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 31: The fourth phase of the coronavirus-triggered lockdown, which began on May 18, saw 85,974 COVID-19 cases till 8 am on Sunday, which is nearly half of the total cases reported in the country so far.

Lockdown 4.0, which will end on May 31 midnight, has accounted for 47.20 per cent of the total coronavirus infection cases, number crunching from the Union Health Ministry data reveals.

The lockdown, which was first clamped on March 25 and spanned for 21 days, had registered 10,877 cases, while the second phase of the curbs that began on April 15 and stretched for 19 days till May 3, saw 31,094 cases.

The third phase of the lockdown that was in effect for 14 days ending on May 17, recorded 53,636 cases till 8 am of May 18.

The country had registered 512 coronavirus infection cases till March 24.

India is the ninth worst-hit nation by the COVID-19 pandemic as of now.        

The first case of COVID-19 in India was reported on January 30 from Kerala after a medical student of Wuhan university, who had returned to India, tested  positive for the virus.

India registered its highest single-day spike of COVID-19 cases on Sunday, with 8,380 new infections reported in the last 24 hours, taking the country's tally to 1,82,143, while the death toll rose to 5,164, according to the Union Health Ministry.

The number of active COVID-19 cases stood to 89,995, while 86,983 people have recovered and one patient has migrated, it said.

"Thus, around 47.75 per cent patients have recovered so far," a senior Health Ministry official said.

With the fourth phase of lockdown ending on Sunday, the Home Ministry on Saturday said 'Unlock-1' will be initiated in the country from June 8 under which the nationwide lockdown will be relaxed to a great extent, including opening of shopping malls, restaurants and religious places, even as strict restrictions will remain in place till June 30 in the country's worst-hit areas.

While announcing the extension of the lockdown in containment zones across the country, the Home Ministry said temples, mosques, churches and other religious places and shopping malls will be allowed to open in a phased manner from June 8, while a decision on opening of schools and colleges will be taken in July in consultation with states.