State-sponsored terrorism most dangerous: Dr Shridhar

Bengaluru, Jan 10: State’s primary and secondary education minister, S Suresh Kumar on Friday asked the Department of Public Instruction to register a complaint in the cybercrime police station against the teacher who shared a video of a child mispronouncing a Kannada word.

The viral video shows the child from a government school incorrectly pronouncing the word 'Pakkelubu' (ribcage).

The minister observed, 'It is normal for children to pronounce words incorrectly and only repetitive practise will make them say it correctly. If a video of such a mistake is made and spread on the Internet the child will see it in future and be demoralised and might start hate learning. The person who made and posted this video has committed a grave crime.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

New Delhi, Apr 15:  Union Health Minister Dr Harsh Vardhan on Wednesday said that both Maharashtra and Karnataka are in a bit of trouble due to spike in COVID-19 cases.

"Bihar is not in so much trouble right now, but definitely, Maharashtra is in a bit of trouble, particularly Mumbai and as well as Karnataka," said Vardhan in a video conference meeting while speaking about surge in COVID-19 tally in the country.

"But I was happy to see the confidence of 3 secretaries more particularly when Maharashtra Secretary said with confidence 'we will take care of it'," he said.

According to the ministry, Maharashtra is the worst-affected state with 2,687 cases of which 259 patients have recovered/discharged while 178 patients have lost their lives due to the virus.

Karnataka has confirmed 277 positive COVID-19 cases, including 75 cured and discharged and 11 deaths.

India's tally of coronavirus cases has risen to 11,933, said the Union Ministry of Health and Family Welfare on Wednesday.

Out of the total tally, 10197 cases are active while 1344 patients have been cured/discharged and migrated and 392 people have succumbed to the virus.