HC notice to AK Hegde, CT Ravi over derogatory remarks against Tipu Sultan

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 3: Opposition leader in the Karnataka Legislative Assembly and former Chief Minister Siddaramaiah on Friday opined that there is no other option left but to resort to 'Jail Bharo' agitation to expose the ruling BJP government's indulge in 'Corona Corruption' which runs into more than Rs 2000 crore.

Siddaramaiah said that according to a submission to the Karnataka High Court the government has submitted that it has incurred Rs 3,392 crore expenditure for Corona in the State so far. While the market price for equipment purchased will not exceed Rs 1163 crore and it clearly shows that the corruption is to the tune of Rs 2,000 crore.

Siddaramaiah speaking to a private TV channel here on Friday said the chief minister B S Yediyurappa-led State government should come out with a White Paper on the money spent for purchases made facilities provided to patients. 

According to submission to the Court, the Government has purchased 1000 Ventilators by paying Rs 120 crore, while the market price is Rs 40 crores at Rs 4 lakh for each Ventilator. Why is Rs 120 crore more paid, does it not lead to doubt the government's claim. For purchase of kits, mask, gloves etc. it amounted to Rs 1,500 crores but paid by the government was Rs 9,000 crore."