Dr Safwan Ahmed receives 'Best Post-Graduate Resident in Neurology Award' at NIMHANS convocation

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Hassan, Jul 16: In fresh incident of cast killing, a Dalit youth in Alur taluk of Hassan district was shot dead yesterday by the relatives of the girl with whom he was in love. 

The deceased identified as Madhu, a 30-year-old resident of Soppinahalli village. He had taken a 25-year-old girl with him and was planning to marry her after taking her family into confidence.  

The relatives of the girl, who belong to upper caste, claimed that Madhu had kidnapped the daughter of one Ramesh of the same village. The girl's uncle Rupesh had waylaid Madhu when he was on the way to the field and shot at him. 

The body of the deceased as been shifted to a mortuary. The accused Rupesh has gone absconding. Sources said that the family of Ramesh has strongly opposed the inter-caste marriage.

Bengaluru, Jun 30: Private medical colleges in Bengaluru have agreed to join hands with the Karnataka government for the treatment of COVID-19 patients.

The representatives from private medical colleges have promised the state government to provide 2000 beds immediately and another 4500 beds will be added within a week.

The development took place as Chief Minister BS Yediyurappa on Tuesday held a second round of meeting with representatives of private hospitals at Vidhana Soudha over COVID-19. 

The Chief Minister and Medical Education Minister Dr K Sudhakar held separate meetings with the representatives from private colleges administration and all the private colleges have assured to extend their support to the government decision. 

"There are 11 private and three government medical colleges in the city and we will get about 6500 beds from these for COVID treatment," Dr Sudhakar informed media after the meeting.

He further said, "These facilities including doctors and staff will be made available to the government within a week and the beds will be allocated to COVID patients through BBMP's centralised system. The insurance facility will be extended to the doctors and staff serving in these private hospitals also."

PG students in private medical colleges and other staff will be utilised in COVID Care Centres, the minister said.

"There will be some changes in the treatment protocols going forward. The decision regarding this will be taken in the meeting that will be held in the evening under the chairmanship of the CM," the minister explained.

According to him, symptomatic patients, persons aged above 60 years and those with comorbidities like diabetes, hypertension and serious kidney, liver, lungs and heart-related ailments will be admitted to hospitals. 

Other asymptomatic persons will be monitored in COVID care centres. Detailed notification with these guidelines will be released tomorrow, the minister said.

The meeting was chaired by CM BS Yediyurappa and Deputy CM Ashwatnarayana, Ministers Basavaraj Bommai, R Ashoka and senior officials were also present.