Never miss a story

Get subscribed to our newsletter


×
A double layer covering was better than a single layer in reducing the droplet spread from coughing and sneezing, the recording showed. Pixabay

Home-made cloth face masks likely need a minimum of two layers, and preferably three, to prevent the dispersal of viral droplets from the nose and mouth that are associated with the spread of Covid-19, say researchers.

Viral droplets are generated during coughing, sneezing, or speaking. And face masks are thought to protect healthy people from inhaling infectious droplets as well as reducing the spread from those who are already infected.


Follow us on Instagram to get regular updates from us!!

For the study, published in the journal Thorax, a team of Australian researchers compared the effectiveness of single and double-layer cloth face coverings (cotton fabric) with a 3-ply surgical face mask (Bao Thach) at reducing droplet spread.

The single-layer covering was made from a folded piece of cotton T-shirt and hair ties; the double layer covering was made using the sewing method.

The researchers used a tailored LED lighting system and a high-speed camera to film the dispersal of airborne droplets produced by a healthy person with no respiratory infection, during speaking, coughing, and sneezing while wearing each type of mask.


The single-layer covering was made from a folded piece of cotton T-shirt and hair ties; the double layer covering was made using the sewing method.Pixabay

The study showed that the 3-ply surgical face mask was the most effective at reducing airborne droplet dispersal, although even a single layer cloth face-covering reduced the droplet spread from speaking.

But a double layer covering was better than a single layer in reducing the droplet spread from coughing and sneezing, the recording showed.

This is just one case, added to which several other factors contribute to the effectiveness of cloth face masks, the researchers noted.

These include the type of material used, design, and fit, as well as the frequency of washing.

Also Read: Pandemic Advise From Authors in Quarantine

Nevertheless, based on their observations, a homemade cloth mask with at least two layers is preferable to a single layer mask, they say, adding: “Guidelines on home-made cloth masks should stipulate multiple layers.”

“There is a need for more evidence to inform safer cloth mask design, and countries should ensure adequate manufacturing or procurement of surgical masks,” the study authors noted. (IANS)


Popular

IANS

As the economy continues to recover from the prolonged pandemic.

By Rohit Vaid
The Centre might bestow infrastructure as well as industry status to new sectors to boost several pandemic hit industries in the upcoming Union Budget. Industry insiders said that several sectors and sub-industries such as hospitality, automobile retail, specific diganotics facilities and companies engaged in installation of EV charging stations amongst others might get the status.
The infra tag will enable these sectors to avail tax breaks, incentives and credit on lower interest rates. "Sectors which are in greenfield or which would need capex augmentation to help them overcome the pandemic can be looked from the lens of an infrastructure sector," said Jagannarayan Padmanabhan, Director and Practice Leader, Transport & Logistics, Crisil Infrastructure Advisory. "Also many of the already identified sectors need a sustained policy push which will help them get visibility both in terms of quantum and the time period of applicability."

Till now, activities associated with laying of power and telecom transmission and distribution lines, roads, highways, railways and construction of facilities such as hospitals, affordable housing, power generation units, water treatment plants, SEZs and certain type of hotels amongst others were given such status.

Besides, these sectors are a part of harmonised master list for infrastructure sub-sectors. However, in April 2021, exhibition-cum-convention centre was included in the list. "Given the focus around electric vehicle, and need for significant investment in charging stations, if the government adds the sector in infrastructure list, the benefits arising out of it will be significant," said Vishal Kotecha, Director, India Ratings and Research. "Infra tag on sectors increases ability to raise funds, access to dedicated funds and lenders, foreign capital, lower interest rates among others."

Electric car Given the focus on electric vehicles, the advantages of including the industry in the infrastructure list will be enormous. Free SVG

Keep Reading Show less
Wikipedia

A team is working to produce safest medicine for covid treatment.

A team led by chief scientist Ravi Shankar, is working on two combinations to provide the safest medication to coronavirus patients. "Experts say that a combination of antivirals with different mechanisms can be more effective to counter the viral pandemic. We are working on two combinations - Umifenovir with Molnupiravir (an antiviral) and Umifenovir with Niclosamide (anti-parasitic)," he said.

Also read: Antiviral Remdesivir Receives FDA

Molnupiravur drug has received only Emergency Use Authorisation in India and abroad. Though its usage showed reduced hospitalisation during clinical trials, its biggest drawback are the side-effects, he added.

"Now, we are trying to keep a low dosage of Molnupiravir in its combination with Umifenovir which may weed out the side-effects such as the risk of cartilage and muscle damage. If successful, it will make Umifenovir more effective in Covid-19 treatment," said the chief scientist. The other combination is Umifenovir with Niclosamide.

Keep Reading Show less
Wikipedia

MEA Jaishankar instructed Indian envoys to Canada and the US, "to urgently respond to the situation."

External Affairs Minister S. Jaishankar on Friday instructed Indian envoys to Canada and the US, Ajay Bisaria and Taranjit Singh Sandhu, "to urgently respond to the situation" where four Indian nationals including an infant have lost their lives on the US-Canada border. The minister said this in a public tweet. Neither of the two missions have responded on the microblogging site till the time of filing of this report.

In a statement Thursday without identifying the victims, the Royal Canadian Mounted Police (RCMP) stated that "on the morning of January 19, 2022, RCMP officers with the Integrated Border Enforcement Team received concerning information from their counterparts in the United States".

Royal Canadian Mounted Police (RCMP) RCMP officers received concerning information from their counterparts in the United States.Wikipedia

Keep reading... Show less