Do not worship Shirdi Sai Baba, says Shankaracharya

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru/Mysuru, May 19: Though the Karnataka government permitted the private buses, operators in Dakshina Kannada district have decided not to operate buses until May end. In Mysuru district too the private buses remained off the roads.

Dakshina Kannada Bus Owners’ Association President Dilraj Alva said “Technically, private bus operators are not able to operate services as all of us have surrendered our permits. If we start services we will have to pay the tax for entire month. Hence, we have decided to resume bus services from June 1.”

The private buses had suspended their services since March 24.

In addition, bus owners also have two more demands which the state government needs to consider on priority, he said.

“We have requested the government to exempt private buses from paying tax for the next six months. We were not plying buses during lockdown and it will be tough for us in the next three months to operate as per new conditions.”

“The government has allowed only 30 persons in each bus to maintain social distancing. In addition, we have been urging the state government for bus fare revision since 2013. The government has revised the bus fares of KSRTC twice after that,” Alva said adding that bus owners will be meeting Mangaluru RTO on Tuesday.

Kasaragod, Mar 23: The district administration on Monday decided to abandon efforts to map out the movement details of the NRI who came from Dubai recently and came into contact with many in North Kerala.

The district has been completely locked down since Monday morning, on the directive of the Central Government. Prohibitory orders have been slapped in the district since Sunday night to restrict socialisation of the people.

As the person now in isolation have allegedly been non-cooperative, the authorities were finding it difficult to sketch out a rote map as his movement and socialisation has been so vast and wide since his arrival here on March 12.

The middle aged and popular NRI who landed at Karipur airpprt on March 11 had been in Calicut till midnight prior to boarding the Maveli Express to make it to his hometown Kasaragod, which is 160 kms away from Calicut. He had come into contact with very many, including two MLAs of the district, prior to getting tested positive and getting isolated in the hospital.