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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Apr 14: Karnataka Chief Minister BS Yediyurappa on Tuesday welcomed Prime Minister Narendra Modi's decision to extend COVID-19 lockdown till May 3.

"Our government will strictly implement the Government of India guidelines, which will be issued tomorrow. Lockdown will be followed more stringently till April 20 as Prime Minister said and the situation will be closely monitored. I appeal to the people of Karnataka to voluntarily cooperate with us to contain this disease," Yediyurappa said.

The chief minister urged the people to respect seven major points that Prime Minister Modi raised in his televised address to the nation on Tuesday, while announcing the extension of coronavirus-induced lockdown.

"I appeal to people to follow the seven measures Prime Minister advised to follow, such as taking care of elders in the house especially those suffering from chronicle illness; strictly maintaining social distancing; enhancing immunity by following guidelines of Ayush Department; download Arogyasetu app; help the poor and needy; to be considerate about your colleagues and employees and not to sack them; and respect the police, healthcare professionals," Yediyurappa added.

The chief minister also assured that there is no scarcity of medicines, essential services and goods.

"We will make all efforts to carry out agriculture activities without any hurdle. I make a special appeal to migrant labours to stay wherever they are and be safe... Stay home and be safe," he said.

According to the Union Ministry of Health and Family Welfare, there are 247 COVID-19 positive cases in Karnataka including 59 cured, discharged, migrated and six deaths.

Belgaum, Apr 27: A CRPF COBRA commando was thrashed and dragged to police station barefoot by police allegedly for violating lockdown norms here in Belgavi district.

Sachin Savant, the CRPF commando of 207 COBRA was arrested by police personnel of Sadalga Police Station on April 23 on the alleged charges of violating lockdown norms and assaulting/deterring public servant from discharging his duty. The incident took place when the commando was cleaning his motorcycle in front of his house at Examba.

Images of the jawan being tied up in chains and the video of the incident have created furore on social media.

Calling it an "unfortunate incident", CRPF Additional Director General (Operations) Sanjay Arora wrote to Karnataka DGP Praveen Sood.

"In an unfortunate incident, Ct Sachin Savant of 207 COBRA was arrested by police personnel of Sadalga Police Station, Distt Belagavi, on Apr 23, on the alleged charges of violating lockdown norms and assaulting/deterring public servant from discharging his duty. The individual was on extended leave and cleaning his motorcycle in front of his house, at Examba, when the incident took place," Arora said in a letter to DGP.

In the video of the incident, the commando is seen standing near a bike, while multiple police personnel indulge in a verbal spat with him. A police personnel can be seen repeatedly pushing and shoving the jawan. The commando retaliates after he was attacked with a lathi by the police.

"Reportedly, a skirmish had taken place between the COBRA commando and the Beat police personnel over wearing of a mask, following which he was manhandled and ill-treated, before his family members, and paraded to the police station barefoot, where he was kept in chains and handcuff," CRPF ADG said.

He said the viral video shows that police personnel's conduct was not "citizen-centric".
Stressing that this "unpleasant situation" could have been avoided, if the Karnataka police had taken CRPF hierarchy into confidence before making the arrest, he said: "CRPF is a very reputed force, with high standards of discipline, and we have the institutionalized mechanism for taking care of such situations."
Arora asked that Karnataka DGP to get the matter inquired and provide justice.

Meanwhile, CRPF spokesperson M Dhinakaran said the bail plea of the commando will be taken up in the court on Tuesday.

"We have taken up the case with State Police Chief of Karnataka. On Tuesday, his bail plea case is coming before the court. The CRPF will be in court through a local officer. Thereafter, an investigation into the matter shall be followed up to take it to the logical conclusion," said Dhinakaran.

Giving clarification on the matter, Belgavi Superintendent of Police told media that the CRPF jawan was found roaming with friends, who ran away on seeing police. However, the jawan was caught without a mask.

"The jawan was standing without wearing a mask. When policemen on duty asked him why he is not wearing a mask, he started arguing asking them who are you to ask and I am from CRPF, thereby violating the orders promulgated by DC," he said.

The SP also claimed that the jawan lost his cool and kicked the stomach of one of the constables.

"The jawan held the collar of the police constable and started pushing him aggressively. Another head constable, who is old, came to the rescue of his fellow colleague. Later the jawan was taken to the police station and a case was registered under various sections of IPC and Section 3 of Epidemic Disease Act against him," he said.