Kannada now compulsory in all schools

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mysuru, Mar 7: Former minister and senior Congress leader and sitting MLA Tanveer Sait has shot off a letter to state Home Minister Basavaraj Bommai expressing his dissatisfaction over the slow progress in the investigations regarding the attack on him.

In the letter, which he released to the press on Saturday, he claimed that although the police have already arrested the culprit, but it is yet to find the real masterminds, leaders or organisation behind the attack.

Mr Sait urged the Home Minister to request the police to speed up their investigation and solve the case at the earliest and give him justice.

Bengaluru, Jan 10: Working President of Karnataka Pradesh Congress Committee, Eashwar Khandre on Friday said that his party has extended its support to the demand made by the former chief minister of Karnataka, HD Kumaraswamy, that a House Committee should be formed to probe into Mangaluru violence.

Emphasising the need for a judicial probe into the incident, Khandre said, "Congress has always said that the truth should prevail and that there should be a judicial inquiry and investigation by a sitting Supreme Court judge or a High Court judge into the incident."

"We support his (HD Kumaraswamy) statement that a House Committee should be set up to probe into the incident of Mangaluru violence. Two innocent people lost their lives during the anti-CAA protest, it is very unfortunate," he added.

Two people were killed in Mangaluru in the alleged police firing after protests against the Citizenship Amendment Act turned violent on December 19.

The Act grants Indian citizenship to refugees from Hindu, Christian, Sikh, Buddhist and Parsi communities fleeing religious persecution from Pakistan, Afghanistan, and Bangladesh who entered India on or before 31, 2014.