BJP will win 150 seats in next Karnataka Assembly polls: Shobha

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Kozhikode, May 21: Six employees of a private clinic here and a taxi driver have been put on mandatory 14 days quarantine as a lady gynaecologist running the dispensary tested positive for COVID-19 in Bengaluru.

District Medical Officer Dr V Jayashree said the gynaecologist had returned to Karnataka a fortnight ago and tested positive while she was on quarantine there. Six staff members of the clinic at nearby Thamarassery and the taxi driver who dropped her inBengaluruon May 5 have been asked to go on quarantine, she said.

Patients had visited the clinic, belonging to the gynaecologist and her doctor husband, till April-end. Sources said the district administration is trying to figure out thecontacts of the gynaecologist, including pregnant women, for being quarantined.

Bengaluru, Apr 15: Amir-e-Shariat Maulana Sagir Ahmad Khan Rashadi, Maulanaon Wednesday urged people to compulsorily follow the lockdown restrictions during the month of Ramdan.

Ramazan fastings should not be missed without valid reasons. As already mentioned, five namaz of the day should be performed at home and do not go to Mosques.

Taraweeh Namaz should be performed at home along with family members, he said at a meeting of Imarat-e-Sharia leaders held at Darul Uloom Sabilurrashad (Arabic College) in the city.