After completing 2-month Yoga course, CISF jawan kills 4 colleagues

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, Mar 23: As many as 600 people who arrived from foreign countries are under the surveillance of the district police in the Dakshina Kannada, as a measure to contain the spread of Covid-19, said Superintendent of Police B M Laxmi Prasad on Monday.

The police personnel are visiting their houses in Dakshina Kannada police jurisdiction. They have been asked to remain quarantined at home for 14 days."We have appealed to the local residents to tip the police if they violate the quarantine period,"he added.

Talking to newsmen here, he said that all the roads in border areas connecting Kerala had been closed, the police have strengthened security in border areas. Please log in to get detailed story.

Bengaluru, Feb 27: Chief minister BS Yediyurappa has again kindled hope for several ministerial aspirants by suggesting he will expand his council of ministers in April. A dozen senior BJP legislators are aspiring for ministerial berths, but there are only six vacancies in Yediyurappa’s cabinet.

However, Yediyurappa suggested on Tuesday he will fill only three spots, one of which would go to Hukkeri legislator Umesh Katti. With this, lobbying has intensified for the two remaining berths as the expansion exercise is expected soon after the budget session that ends on March 29.

The aspirants include Murugesh Nirani, S Angara, Appachhu Ranjan, SA Ramdas, Aravind Limbavali, Narasimha Nayak and GH Thippareddy besides others.

Yediyurappa, it is being said, is keen on inducting Katti and Limbavali since they are close to him. He will leave the decision on choosing legislators for the remaining two berths to the party’s central leadership.

On more than one occasion in the past, Yediyurappa has publicly stated that his wish is to induct Katti, a former minister, into the cabinet. In fact, the CM had wanted to induct Katti in the previous expansion that took place last month, but dropped the idea at the last minute due to pressure from party bosses.

The CM is also under pressure to induct Athani legislator Mahesh Kumatalli, who was among 17 Congress-JD(S) MLAs who resigned to help the saffron party form the government. Several BJP MLAs and Lingayat seers have been piling pressure on Yediyurappa to make Kumatalli a minister as promised.

Kumatalli was denied a cabinet berth only to accommodate Katti. Both are Lingayats and from Belagavi district. As the Lingayat community already has a lion’s share in cabinet berths, the CM cannot afford to induct both.

Nirani, who has been leaving no stone unturned to secure a spot, reiterated his wish to become minister, but insisted he will not lobby for the post.

Yediyurappa has been upset with Nirani for lobbying for a berth through Panchamasali Mutt seer Vachananand Swami. The former minister was also part of the team of alleged disgruntled MLAs which met Jagadish Shettar at his residence to put pressure on the CM for cabinet berths.

However, while expressing confidence of being made minister when Yediyurappa’s expands his cabinet next, Nirani said, “Yediyurappa is not upset with me. My relationship with him is that of father and son. He knows me and what I am.”