Yediyurappa should apologise to nation for Ballari incident: DK Shivakumar

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Kalaburagi, Mar 25: Three coronavirus suspect persons who did not stay home during their mandatory 14-day quarantine period had first information report (FIRs) booked against them in police stations in Kalaburagi town in Karnataka.   

The district administration took this action after it came to know that the three pesons were mingling in the public despite being told to stay home to avoid passing on the coronavirus.

Cases have been booked against them under IPC sections 188 and 271, deputy commissioner B Sharath said.

Stringent action would be taken against them, he said, for not only threatening the health of their family members but society at large.

“The administration will stop at nothing to safeguard public health in this time of emergency,” Sharath said.

People moving around on motorbikes without a proper reason will have their bikes seized. Prohibitory order under Section 144 of CrPC will remain in force until further orders, he said.  

Bengaluru, Jun 18: Bruhat Bengaluru Mahanagara Palike (BBMP) has deployed a COVID-19 infection control "surveillance team" to look after travellers coming from other states.

Those coming to Bengaluru Urban and Bengaluru Rural Districts must undergo a 14-day home quarantine.

The Bengaluru Mayor today inaugurated surveillance team at Dr Raj Kumar Glass House.

Deputy Mayor Ramamohan Raju, Health Standing Committee Chairman Manjunath Raju G, Special Commissioners D Randeep, Manjunath, Superintendent of Police Mr Murugan and other officials were also present in the event.

There are 7,944 coronavirus cases in Karnataka including 2,843 active cases and 4,983discharged. 114 patients have succumbed to COVID-19 in the state. 844 positive cases were reported in Bengaluru Urban and 39 in Bengaluru Rural.