Coastal Karnataka has become a hotbed of ‘jihadi activities: Shobha in Lok Sabha

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Apr 22: City Police Commissioner Dr P S Harsha, on Wednesday, interacted with families of Covid-19 warriors of the Police Department through a special video conference to infuse confidence in them.

He spoke to the family members of the police personnel who, along with ASHA workers, are monitoring the home quarantined people and even assist them in supplying essentials and medicines.

Most of the family member of the police personnel were of North Karnataka origin and the Commissioner asked them to stay safe by staying at home and explained to them the good work done by their family members in the Police Department.

Bengaluru, Jun 4: Leader of Opposition in Karnataka Siddaramaiah on Thursday said it was not appropriate to reopen schools for two more months, given the current rate at which coronavirus infection is spreading.

He also advised Chief Minister B S Yediyurappa and Primary and Secondary Education Minister Suresh Kumar not to take any hasty decisions in this regard.

"As corona infection is spreading in the state beyond limits, it is not appropriate to open schools for at least two more months. Chief Minister and Suresh Kumar should not make any hasty decisions," Siddaramaiah tweeted.

Stating that Suresh Kumar has placed a proposal to reopen schools in July, he said the chief minister has to take note of worried parents opposing this proposal.

"There are reports about students getting infected by coronavirus after reopening of schools in countries like Britain, France and Italy. It is appropriate to think about reopening schools on analysing the situation after two months," he said in another tweet.

The state government has sought an opinion from parents and stakeholders regarding reopening of schools in the state, with the easing of the COVID-19 lockdown norms.

Amidst worries and concerns expressed by parents across the state, the Education Minister on Wednesday had assured that the government would not take any hasty decisions regarding reopening of schools.

The Union government, in its recent guidelines, had asked state governments to hold consultation at school, college, training and coaching institutions-level with parents and other stakeholders, and based on the feedback, a decision on reopening them would be taken.