BSY appeals HC to prevent media, Cong leaders from talking about his ‘past’

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jun 12: Karnataka on Saturday reported 209 discharges, as the state confirmed 308 new cases of COVID-19 and three related fatalities, taking the total number of infections to 6,824 and the death toll to 81.

With the 14 new cases, the total number of covid cases in Udupi district alone today reached 1005. Dakshina Kannada today reported 30 cases and the tally mounted to 263. 

Today highest cases were reported from Kalaburgi (67), followed by Yadgir (52), Bidar (42) and Bengaluru Urban (31). More details to follow.

Kasaragod, May 30: Karnataka origin IPS officer D Shilpa has been appointed the new Superintendent of Police of Kasargod district.

The 35-year-old 2016-batch IPS officer is the first woman SP of Kasaragod. 

Her appointment follows the sudden transfer of P S Sabu who was hitherto holding the post. He has now been appointed as SP of Alappuzha.

Shilpa has earlier served as ASP of Kasargod. She was also ASP of Kannur during the 2019 Lok Sabha elections.

Shilpa was one of the three IPS officers assigned to Kasaragod with IG Vijay Sakhare during the first phase of covid lockdown.

A native of HSR Layout in Bengaluru, Shilpa holds a Bachelor's degree in Electronics Engineering and a Masters Degree in Business Administration.