Communal conspiracy aborted: Sangh Parivar activist arrested for placing meat in front of temples

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 1: The state government has identified five districts, including Dakshina Kannada, as 'cluster zones' or 'Red zones,' to prevent the spread of Novel Coronavirus.

The other four districts include Mysuru, Uttara Kannada, Bengaluru and Chikkaballapur.

Mangaluru has been under strict lockdown, as it is close to Kasargod in Kerala, which reported many positive cases and is also one of the 'hotspots' in the National Centre for Disease Control (NCDC) list.

Bengaluru, Jul 18: Bringing a major change in the  administration of Bengaluru, which has emerged as a Covid-19 hotspot, the state government on Saturday transferred B H Anil Kumar out of the BBMP and brought N Manjunath Prasad to take his place. 

Manjunath Prasad, who headed the Bruhat Bengaluru Mahanagara Palike (BBMP) before being replaced by Kumar, will take over with immediate effect. The government has also placed him in concurrent charge of the Revenue Department as well as the Disaster Management, Bhoomi and UPOR.

Kumar, an Additional Chief Secretary, has been put in a place where earlier a secretary was posted. He now heads the Department of Public Enterprises. The posting would have brought him two spots down had it not been for the government upgrading it to the level of additional chief secretary. 

Anil Kumar, who was earlier praised for his work to contain the coronavirus pandemic, had faced criticism by the High Court of Karnataka for the BBMP's failure to help people in containment zones as well as other issues on the spread of the pandemic. 

Sources in the government said, pressure has been building up against Anil Kumar over the last two months after most of the Bengaluru MLAs complained to the chief minister's office.

"No MLA backed him. Everyone had a problem," a source said. 

Things came to the head with regard to a Rs 436 crore project given to KRIDL. "The issue reached the chief minister's office as all the MLAs took an issue with the way the project was awarded," a source said. 

Another source said that Kumar came under fire after a central team flagged the issue of failing Covid-19 surveillance measures in Bengaluru. The central team's criticism, it is widely believed in the government, came as the last straw.