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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 22: Former Chief Minister and the Opposition Leader in the Karnataka Assembly Siddaramaiah appealed the state government not to discriminate the poor on political lines while distributing relief package to the COVID-19 affected people in the state.

He was speaking to newsmen after attending a grocery kits distribution programme, organised in Jayanagar Assembly constituency, which was represented by the Congress MLA and former minister Ramalinga Reddy.

Charging that there are complaints about the state government in discriminating the Congress MLAs represented constituencies in providing relief kits to distribute among the poorer sections in the society, he said that “there should not be no room for politics, while fighting the COVID-19 disease”.

Bengaluru, Apr 28: A CRPF jawan has been arrested in Karnataka for allegedly defying the COVID-19 lockdown norms with the paramilitary force taking strong exception to his 'ill treatment', following which an inquiry has been ordered by the state police.

State DGP Praveen Sood has ordered inquiry into the incident, which has triggered a row after a video of it went viral.

In the clip, some police constables are purportedly seen hitting CRPF soldier Sachin Sawant with sticks in Belagavi.

According to the information shared on social media, Sawant was washing his bike when a police team reached the spot and started beating him up for not wearing a mask during the lockdown.

Taking a serious view of the 'ill-treatment' meted out to its Cobra Commando, the CRPF has written a letter to the Karnataka police demanding an investigation into the matter.

In a letter to the DGP of Karnataka, the additional Director general of police of CRPF Sanjay Arora said Sawant was cleaning his bike when a skirmish happened between him and the police over not wearing the mask.

Arora wrote, "Sawant was manhandled and ill-treated, before his family members and paraded to the police station barefoot, where he was kept in chains and handcuff.

From the scrutiny of a viral video on social media, it is apparent that the conduct of police personnel was not citizen centric."

The CRPF ADGP also said the 'unpleasant' situation could have been avoided if the Karnataka police had taken CRPF hierarchy into confidence before making the arrest.

In response, Sood ordered an inquiry into the matter.

He tweeted that IGP Belagavi has been asked to conduct a probe into the incident involving CRPF constable. Action will be taken against guilty after receipt of report, he said.

According to sources, Home Minister Basavaraj Bommai has directed the state police chief to conduct a detailed inquiry into the incident.

Denouncing the arrest, Karnataka Irrigation Minister Ramesh Jarkiholi has sought the release of the CRPF jawan.

"It was wrong on the part of the constables to ill treat CRPF jawan and an inquiry be conducted against the erring policemen," said jarkiholi in a press release.

However, Superintendent of Police of Belagavi district, Laxman Nimbargi defended the arrest of Sawant.