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Jun 13: Requiring the wearing of masks to prevent the spread of the novel coronavirus in areas at the epicenter of the global pandemic may have prevented tens of thousands of infections, a new study suggests.

Mask-wearing is even more important for preventing the virus' spread and the sometimes deadly COVID-19 illness it causes than social distancing and stay-at-home orders, researchers said, in the study published in PNAS: The Proceedings of the National Academy of Sciences of the USA.

Infection trends shifted dramatically when mask-wearing rules were implemented on April 6 in northern Italy and April 17 in New York City - at the time among the hardest hit areas of the world by the health crisis - the study found.

"This protective measure alone significantly reduced the number of infections, that is, by over 78,000 in Italy from April 6 to May 9 and over 66,000 in New York City from April 17 to May 9," researchers calculated.

When mask-wearing went into effect in New York, the daily new infection rate fell by about 3% per day, researchers said. In the rest of the country, daily new infections continued to increase.

Direct contact precautions - social distancing, quarantine and isolation, and hand sanitizing - were all in place before mask-wearing rules went into effect in Italy and New York City. But they only help minimize virus transmission by direct contact, while face covering helps prevent airborne transmission, the researchers say.

"The unique function of face covering to block atomization and inhalation of virus-bearing aerosols accounts for the significantly reduced infections," they said. That would indicate "that airborne transmission of COVID-19 represents the dominant route for infection."

The U.S. Center for Disease Control and Prevention on Friday urged organizers of large gatherings that involve "shouting, chanting or singing to strongly encourage the use of cloth face coverings to lower the risk of spreading the coronavirus."

India's COVID-19 tally raced past the seven lakh-mark with 22,252 fresh infections on Tuesday, five days after crossing the six lakh post, while the death toll climbed to 20,160 as 467 more people succumbed to the disease, according to the Union health ministry.

With this, the country has recorded over 20,000 cases of the infection for the fifth consecutive day.

India's coronavirus infection caseload stands at 7,19,665, the ministry's data updated at 8 am showed.

With a steady rise, the number of recoveries stands at 4,39,947, while there are 2,59,557 active cases of coronavirus infection in the country.

"Thus, around 61.13 % of patients have recovered so far," an official said.

The total number of confirmed cases also includes foreigners.

Of the 467 deaths reported in the last 24 hours, 204 are from Maharashtra, 61 from Tamil Nadu, 48 from Delhi, 29 from Karnataka, 24 from Uttar Pradesh, 22 from West Bengal, 17 from Gujarat.

Telangana and Haryana reported 11 deaths each; Madhya Pradesh nine; Andhra Pradesh seven; Jammu and Kashmir six; Rajasthan and Punjab five each; Bihar, Kerala and Odisha two each; and Arunachal Pradesh and Jharkhand one each.

Kochi/Mumbai, Jan 24: Two students who recently returned from China have been kept under medical observation at the Ernakulam Government Medical College here for possible exposure to the coronavirus, an outbreak of which in China has triggered a global health scare.

Reports from Mumbai said two persons there too have been put observation at the civic-run Kasturba Hospital in Chinchpokali, PTI reported.

Health officials said no cases of the deadly infection have been detected.

One of the students being screened in Kerala and both being screen in Mumai have reported symptoms such as cold and fever and has been kept in isolation wards.

The additional district medical officer of Ernakulam, Dr S Sreedevi, said samples of the student’s body fluids would be sent to the National Institute of Virology in Pune for tests.

The youngster consulted a doctor at a private hospital and was referred to the Ernakulam hospital in the wake of the virus outbreak in Wuhan city of China.

A stringent screening system has been set up at the Kochi International Airport to screen passengers who have been in the affected province in China. Persons who have been to Wuhan and showing symptoms of cold, cough and fever are being immediately shifted to the Ernakulam hospital.

All quariantine facilities have been put in place there including an isolation ward and a ventilator.

The other person under observation in Kerala is an MBBS student from Kottayam district who recently returned from his college in China. The district medical office said she has no health issues. She was put under observation as a precautionary measure.

In Mumbai, 1,789 passengers have undergone thermal screening at the Chhatrapati Shivaji Maharaj International Airport for the coronavirus since January 19.

Coronavirus cases were first reported from Wuhan, the capital of central Chinas Hubei province in China.

In the wake of the coronavirus outbreak in China, doctors at international airports have been asked to screen travellers for symptoms if they are returning from China. All private doctors have been asked to alert the authorities if they observe symptoms of the coronavirus.