I am victim of both the system and corrupt politics: Anupama Shenoy

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Apr 8: Till date 181 COVID-19 positive cases have been confirmed in Karnataka including five deaths and 28 discharges, said State Government on Wednesday.

Six new positive cases have been reported from April 7, 5:00 PM to April 8, 12:00 noon, informed Karnataka Government in a bulletin.

Out of the six fresh cases one has been reported from Uttarakannada, two from Kalburgi, one from Mandya, one from Chikkaballapur and one from BBMP Bengaluru.

"In view of breaking the chain and containment of COVID-19, Karnataka State Board of Auqaf, Bengaluru has directed to all the managements not to allow any congregational prayers in the Masajid and the managements of the Qabrasthans (Muslim graveyards) / Darghas throughout the state and to suspend the visit of public on the occasion of SHAB-EBARAT on thursday, April 9," said State Government in its bulletin.

No public shall be allowed to perform religious rituals in the Qabrasthans/Darghas and all the gates of Qabrasthans/Darghas shall be kept closed.

All managements of Qabrasthans/Darghas shall take necessary action on the above directions and all Waqf officers, District Waqf Advisory Committee in state shall adhere to the orders and directed to circulate the same and to ensure the order is followed scrupulously, the State Government added.

India's tally of positive COVID-19 cases stands at 5,194, said the Ministry of Health and Family Welfare on Wednesday.

Out of the 5194 cases, 4,643 are reported to be active while 401 people have recovered or have been discharged and one has migrated. The death toll stands at 149.

Mangaluru, Mar 26: About 2,771 people are home-quarantined in the wake of the novel coronavirus in Dakshina Kannada district here, Deputy Commissioner said on Wednesday.

"Meanwhile, about 20 people have completed the mandated 28 days of quarantine, DC Sindhu B Rupesh said in a statement here.

More than 38,000 people from the district have been screened and seven are admitted and are under observation, he added.