Prakash Raj slaps legal notice on Pratap Simha over defamatory post

Mangaluru, May 3: Dakshina Kannada in-charge minister Kota Srinivas Poojary today announced that there will be partial lockdown relaxations in the district from tomorrow (May 4) from 7 a.m. to 7 p.m.

The district falls under orange zone as per the classification done by the union government to contain the spread of coronavirus.

Mr Poojary said that shops can remain open for 12 hours (7 a.m. to 7 p.m.). However, this relaxation will not apply for malls, restaurants, beauty parlors, saloons and dental clinics. 

Even though bars can remain open, they can only sell liquor. People will not be allowed to consume anything inside the bar. 

In auto-rickshaws only one passenger will be allowed to travel apart from driver and in car two passengers will be allowed apart from driver. 

The relaxations come with strict protocols, which the people need to follow, he said, adding that the relief had been provided to make life easier and not for people to come out unnecessarily.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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