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Bengaluru, Mar 2: The Opposition Congress and the JD(S) members protested in the Karnataka Legislative Assembly on Monday over the BJP leader Basavaraj Patil Yatnal's alleged derogatory remark against veteran freedom fighter H S Doreswamy.

Opposition Leader in the Assembly and former Chief Minister Siddaramaiah, raised the issue, immediately after the obituary reference of sudden demise of former Minister C Chanigappa, and sought permission from the Speaker to raise the issue of Yatnal's outburst in the House stating that the matter of hurling defamatory remark against Gandhian Doreswamy, by Mr Yatnal, was very much serious. However, the treasury bench members protested and urged the Speaker not to allow the matter to discuss as the issue was not in the agenda.

The Speaker, Vishveshwar Hegde Kageri, promised the Congress leader about permitting the issue after the House adopts resolution on the thanksgiving motion for the Governor's address of the joint House recently and asked Chief Minister B S Yediyurappa to continue his reply to the Governor's address.

The opposition Congress and the JD(S) members, protesting the Speaker's action, trooped into the well of the house and raised slogans against the BJP government.

The Chief Minister continued his reply amidst the din before the Speaker adjourned the House for 30 minutes after the House adopted the thanksgiving motion to the Governor's Address.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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