Mangaluru: BJP MP calls Siddaramiah a 'murderer'

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jul 19: A viral video claiming to show crowded condition of a hospital treating COVID-19 patients in the city was found to be false with police on Sunday arresting a person for allegedly circulating it on social media.

Police said such videos have the potential to create panic and asked people to refrain from spreading them.

The arrest was made within hours of the police announcing registration of a case in connection with the video that showed a crowd of people wearing masks at an "outpatient ward" of a hospital, falsely identified as Victoria Hospital, a major dedicated COVID facility here.

The video went viral on social media.

"City Crime Branch swiftly identified and arrested this person who has been circulating false videos of panic in Victoria Hospital, Bangalore. Kudos to all doctors and medical professionals who are doing their best. False news busted," Bengaluru Police Commissioner Bhaskar Rao tweeted.

Police said such videos have the potential to create panic in society and asked people to refrain from it.

"Covid False video about conditions of hospitals in Bangalore circulated on social media. Case registered in Cybercrime PS. While government, society at large fighting the pandemic, some are creating/forwarding messages/videos which has potential to create panic in society. Refrain from it," Joint Commissioner of Police, Crime, Sandeep Patil tweeted.

The video showed scores of people wearing masks gathered in a small space allegedly at an Out-Patient Department in a hospital, and a person filming it, claiming to be a doctor expressing concern that it was a threat to all medical staff, including the patients.

Official sources said the video was reportedly from a hospital in one of the northern states and not from Victoria Hospital.