Harekala Hajabba, the orange seller who set up school for underprivileged, chosen for Padma Shri 2020

Bengaluru, Jul 16: Karnataka chief minister BS Yediyurappa on Tuesday said he would request Prime Minister Narendra Modi for more relaxations, as he made it clear that Covid-19 lockdown measures were not required in the state anymore.

"The lockdown is not required for Karnataka, we will request for more relaxations," Yediyurappa said in response to a question about video conferencing with the Prime Minister.

Speaking to reporters here, he said, "I will request him (PM) to make way for- people to lead a normal life and for the improvement in the economic situation."

Several services such as metro, theatres, gyms, swimming pools, bars among others continue to remain restricted under unlock 1.0 that is currently in place.

Modi is scheduled to hold a video conference with chief ministers of various states on Tuesday and Wednesday. Yediyurappa is scheduled to take part in the video conferencing on Wednesday.

The chief minister, who took part in the special pooja organised at Shankar Math here to pray for the control of Covid-19, said, the government was making all efforts to control the spread.

"We are taking strong measures and all of us should fight this together," he said, as he highlighted that the government has released the financial assistance amount that was announced for farmers, and was ensuring that it reaches them.

Udupi, Jul 21: Udupi Court complex has been sealed down for two days for sanitisation after a judge tested positive for Covid-19, a source said on Tuesday.

The Covid cases in Udupi district which had reduced recently are once again seeing a spurt. On Monday, as many as 98 have tested positive taking the total cases in the district to 2,321.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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