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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."

Huawei will be completely removed from the UK's 5G networks by the end of 2027, the UK government announced on Tuesday after a review by the country's National Cyber Security Centre (NCSC) on the impact of US sanctions against the Chinese telecommunications giant.

In the lead up to this complete removal of all Huawei kit from UK networks, there will be a total ban on the purchase of any new 5G kit after December 31, 2020.

The decision was taken at a meeting of the UK's National Security Council (NSC) chaired by Prime Minister Boris Johnson, in response to new US sanctions against the telecom major imposed in May which removed the firm's access to products which have been built based on US semiconductor technology.

5G will be transformative for our country, but only if we have confidence in the security and resilience of the infrastructure it is built upon, said Oliver Dowden, UK Secretary of State for Digital, Culture, Media and Sport (DCMS).

Following US sanctions against Huawei and updated technical advice from our cyber experts, the government has decided it necessary to ban Huawei from our 5G networks. No new kit is to be added from January 2021, and UK 5G networks will be Huawei free by the end of 2027. This decisive move provides the industry with the clarity and certainty it needs to get on with delivering 5G across the UK, he said.

The minister, who laid out the details of the UK's ban on Huawei in the House of Commons, said the government will now seek to legislate with a new Telecoms Security Bill to put in place the powers necessary to implement the tough new telecoms security framework.

By the time of the next election (2024) we will have implemented in law an irreversible path for the complete removal of Huawei equipment from our 5G networks, said Dowden.

The new law will give the government the national security powers to impose these new controls on high risk vendors and create extensive security duties on network operators to drive up standards, DCMS said.

Technical experts at the NCSC reviewed the consequences of the US sanctions and concluded that Huawei will need to do a major reconfiguration of its supply chain as it will no longer have access to the technology on which it currently relies and there are no alternatives which we have sufficient confidence in.

They found the new restrictions make it impossible to continue to guarantee the security of Huawei equipment in the future.

After a ban on the purchase of new Huawei kit for 5G from next year, the aim is to completely remove the Chinese vendor's influence on 5G networks across the UK by the end of 2027.

The DCMS said Tuesday's decision takes into account the UK's specific national circumstances and how the risks from these sanctions are manifested in the country.

The existing restrictions on Huawei in sensitive and critical parts of the network remain in place, it highlighted.

The DCMS said the US action also affects Huawei products used in the UK's full fibre broadband networks. However, the UK has managed Huawei's presence in the UK's fixed access networks since 2005 and we also need to avoid a situation where broadband operators are reliant on a single supplier for their equipment.

As a result, following security advice from experts, DCMS is advising full fibre operators to transition away from purchasing new Huawei equipment. A technical consultation will determine the transition timetable, but it is expect this period to last no longer than two years.

The government said its new approach strikes the right balance by recognising full fibre's established presence and supporting the connections that the public relies on, while fully addressing the security concerns.

It stressed that its new policy in relation to high risk vendors has not been designed around one company, one country or one threat but as an enduring and flexible policy that will enable the UK to manage the risks to the network, now and in the future.

Wuhan, Jun 9: China on Tuesday dismissed as "incredibly ridiculous" a Harvard study, which pointed to a surge in traffic outside Wuhan hospitals from August 2019 suggesting that the coronavirus hit the area far earlier than reported.

A whitepaper on coronavirus released by China on Sunday said the virus was first noticed on December 17 and Chinese virologists confirmed human-to-human transmission on January 19, prompting authorities to impose lockdown of Wuhan from January 23.

US President Donald Trump and leaders of several countries have accused China of not being transparent in reporting the deadly disease, leading to huge human casualties and economic crisis across the world.

The new study by Harvard researchers says satellite images show an increase in traffic outside five hospitals in Wuhan from late August to December.

The traffic spike coincided with a rise in online searches for information on symptoms like "cough" and "diarrhoea".

China said the study was "ridiculous" and based on "superficial" information, BBC reported.

It is believed that the virus first appeared in China some time in November. Authorities reported a cluster of pneumonia cases with an unknown cause to the World Health Organization (WHO) on December 31.

"Clearly, there was some level of social disruption taking place well before what was previously identified as the start of the novel coronavirus pandemic," Dr John Brownstein, who led the research, told ABC news.

The study has not been peer-reviewed.

The researchers examined commercial satellite data from outside five Wuhan hospitals, comparing data from late summer and autumn 2018 to the same time period in 2019.

In one case, researchers counted 171 cars parked at one of Wuhan''s largest hospitals, Tianyou Hospital, in October 2018.

Satellite data from the same time in 2019 showed 285 vehicles in the same place, an increase of 67 per cent.

A surge in online searches for words associated with the symptoms of coronavirus on the Chinese search engine Baidu seemed to emerge at the same time.

"This is all about a growing body of information pointing to something taking place in Wuhan at the time," Dr Brownstein said.

"Many studies are still needed to fully uncover what took place and for people to really learn about how these disease outbreaks unfold and emerge in populations. So this is just another point of evidence," he said.

Asked for her reaction at the media briefing, Chinese Foreign Ministry spokeswoman Hua Chunying dismissed the findings as "incredibly ridiculous".

"I think it is ridiculous, incredibly ridiculous, to come up with this conclusion based on superficial observations such as traffic volume," she said.

"(I have) Not seen the research you mentioned. If the conclusion is drawn based on traffic volumes (and) other superficial observations, it won’t be a sound conclusion," she said and referred to the allegations about the COVID-19 originating from the Wuhan Institute of Virology (WIV) by Trump.

"That allegation was proved to be wrong," she said.

When pointed out that China says it respects science based inquiry and Harvard is one of the top universities in the world, Hua said, "on the origin of virus there are lot of conspiracy theories against China”.

"That is very unfair. At the moment, the pressing task is to enhance coordination to contain the spread of the virus. Someday, I am sure the truth will be out. China deserves a fair and objective evaluation," she said and referred to the whitepaper released by the Chinese government detailing evolution of coronavirus in Wuhan and how Beijing handled the situation.

Recently, the World Health Assembly (WHA), the decision-making body of Geneva-based World Health Organization (WHO), passed a resolution to probe the origin of the virus. China also backed the resolution.

As of Monday, the overall confirmed cases on the mainland had reached 83,043, including 58 patients who were still being treated, with no one in severe condition, China’s National Health Commission, (NHC) said.

Altogether 78,351 people had been discharged after recovery and 4,634 people had died of the disease, it said.