Prashant Poojary murder accused Mustafa dies after attack in jail

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, Mar 13: Health Minister B Sriramulu on Thursday assured the House that the state government will recruit doctors in all Primary Health Centres across the state through direct recruitment by the end of April this year.

The minister was answering MLA A T Ramaswamy, who raised the issue of shortage of doctors on Thursday. Sriramulu said there are 2,359 primary health centres in Karnataka, of which 1,432 centres have permanent doctors, 436 have doctors on contract basis, 236 have Ayush doctors, 55 have doctors who work under rural service, and the rest work on contract basis under the National Health Mission.

Chief Minister B S Yediyurappa, who had recently directed ministers to cancel KPSC recruitment and go for direct recruitment, expressed his anger  as it hasn’t been implemented even now. Sriramulu said, “I have directed the concerned District health officer to take action and go for direct recruitment. It will be done by end of April.”

He also said he is aware of the difference in salary between doctors working under the health department and those working under the medical education department. “This will also be rectified,’’ he assured.

Meanwhile, Sriramulu said that a hospital that he had inaugurated recently in Mysuru, has been shut due to the lack of doctors and furniture. “This will be sorted out soon,’’ he assured.

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.