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The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study

Bengaluru, May 1: The Karnataka government on Friday issued a show cause notice to an IAS officer over his recent tweet about coronavirus-cured Tablighi Jamaat members donating plasma for treatment of other patients.

The officer, Mohammad Mohsin, was in the news last year after the Election Commission suspended him for trying to inspect Prime Minister Narendra Modi's helicopter during his visit to Odisha in April. He was deployed as a poll observer.

"More than 300 Tablighi Heroes are donating their plasma to serve the country in New Delhi only. What about? #Godi Media? They will not show the works of humanity done by these heroes," Mohsin said in a tweet on April 27.

A 1996 batch IAS officer from Karnataka cadre hailing from Bihar, Mohsin is currently serving as a secretary in the Backward Class Welfare Department.

The state government said the show cause notice has been issued to the officer in connection with his tweet.

"The adverse coverage this tweet has got in the media has been taken note of seriously by the government, given the serious nature of COVID-19 and the sensitivities involved," the notice, which was accessed by PTI, stated.

The government has sought a written explanation from the officer within five days for violating the All India Services (Conduct) Rules, 1968.

It warned of action against Mohsin as per the All India Services (Discipline and Appeal) Rules, 1969 if he fails to submit his reply before the deadline.

"The Karnataka government has made it clear that it would not hesitate to act even against powerful functionaries if their actions are damaging to the harmony in the state at a time when all are united in fighting COVID-19," a senior state bureaucrat said.

The Tablighi Jamaat, an Islamic missionary group, shot into the limelight early this year after thousands of its members who attended a congregation in south Delhi's Nizamuddin in March tested positive for coronavirus.

After attending the event, the group's members travelled to various parts of the country, with many of them carrying the virus.

Bengaluru, Jan 18: The government slammed Kerala’s tourism department for putting out a tweet on Sankranti Day, promoting ‘beef ularthiyathu’, a specialty in that state, but the move backfired spectacularly with Karnataka’s tourism minister being heavily trolled.

After Kerala put out its advertisement, state tourism minister CT Ravi, seizing the opportunity, took a dig at the Left government in Kerala, saying, “Welcome to Karnataka”. He followed that up with another tweet listing delicious “vegetarian” dishes of coastal Karnataka — a coastline which runs to Kerala.

“Welcome to Karnataka to bring out the Vegetarian in you. Enjoy the flavors of Tulu Nadu – Pathrode, Kotte Kadubu, Halasina Hannina Gatti, Avalakki Upkari, Badanekayi Mosaru Gojju and a whole lot of authentic food to hit Your tastebuds,” Ravi’s tweet read.

Ravi’s tweet sparked a debate between those for and against eating beef, including legislators like Sowmya Reddy (Congress) and Shobha Karandlaje (BJP). Some pointed out that Karnataka is 80% non-vegetarian and an appropriate response to beef curry would have been “pandi curry” (wild pig curry) — a Kodagu specialty.

Realising his tweets were getting more negative than positive traction, Ravi quickly amended his stand and on Friday tweeted: “Nati Koli Saaru Mudde. Aw! Delightful Delicacy of Old Mysuru region. Farm bred Chicken traditionally cooked to perfection and served with the soft Ragi Mudde. You will ask for more !!!”