Moily casts doubt on Team Anna's motive

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, May 8: Twenty-two students of Jawahar Navodaya Vidyalaya (JNV), Mudipu on the outskirts of Mangalur city, stranded in Uttara Pradesh due to lock-down reached the campus on Friday morning.

These Class 9 students (12 girls and 10 boys) had studied at JNV Amroha, Uttar Pradesh, as part of an exchange programme, 21 students of Amroha campus studied in Mudipu. 

While Amroha students could return after completing their studies, the Mudipu students were among many JNV students who were unable to return because of the lock-down.

JNV Mudipu Principal V Srinivasan said the 22 students, along with escorts, reached the campus at 7.15 a.m today.

Mangaluru, May 22: Following requests from Kannadiga entrepreneurs in Kingdom of Saudi Arabia and persistant efforts of former deputy chairperson of the NRI Forum of Karnataka government Dr Arathi Krishna, the government of India has finally approved the repatriation of stranded Indian expatriate workers amidst prolonged covid-19 lockdown through chartered flights arranged by their employing companies particularly in Gulf region and elsewhere. 

The government has also issued a Standard Operation Protocol (SOP) to be followed to be followed by those who hire the flights. The government's nod will not only allow repatriation of larger number of citizens, who are on wait-lists, but also allows private airlines to get their aircraft, crew, and operational staff actively working again in preparation for resumption of scheduled flights. 

Zakaria Jokatte, CEO of Al-Muzain Est. and K S Sheik, Director of Operations at Expertise Contracting Co. Ltd - both Mangalurean entrepreneurs in Saudi Arabia - were among those who had sought permission to hire chartered flights for the immediate repatriation of their hundreds of employees. 

The NRI entrepreneurs in Gulf have thanked Dr Arathi Krishna for continuously persuading the authorities concerned to issue green signal for the operation of chartered flight at a time when there were only a few scheduled flights under Vande Bharat Mission. 

Welcoming the move Dr Arathi Krishna told coastaldigst.com that Indians stranded in any foreign country can utilize this facility. "Initially, I was approached by Mr Zakaria and Mr Sheik who wanted chartered flights to help their employees fly back to India. I asked them to write to the Indian Ambassador in Saudi Araia Mr Ausaf Sayeed. Then I requested the ambassador to forward the request to Joint Secretary Dr Nagendra Prasad, who is in charge of gulf division in the Ministry of External Affairs, and then to Secretary on charge of Gulf and then I requested Secretary of Economic Relations Mr T S Tirumurti who was also in charge of Gulf to follow this up," she said. 

"There were similar requests for chartered flights from African countries too. Then I persisted officers constantly to take it up to the Foreign Secretary Harsh Vardhan Shringla and Civil Aviation Minister Hardeep Singh Puri and now all the people requesting this from Saudi Arabia have got confirmation from the ministry and communicated by embassy to those who had requested for the chartered flights," she said.