Mangaluru: BBA student who thrashed principal arrested, finally

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jan 18: The Dakshina Kannada District Karavali Utsava Samiti has chosen senior Journalist and Assistant Editor on Udayavani Daily Manohar Prasad for the Karavali Gaurava Prashasti 2019-20.

The award will be presented to Manohar Prasad in recognition of his contribution in the field of Journalism.

He will be given the award during the valedictory of the Karavali Utsav at Panambur beach on January 19.

Bengaluru, Apr 14: The Congress in Karnataka on Tuesday welcomed the extention of the COVID-19 lockdown till May 3, though it flayed Prime Minister Narendra Modi for not announcing any programme to support the slowed down economy.

Reacting to the lockdown extension, Congress president D K Shivakumar said it was much needed to control the virus but expressed his displeasure for not offering any relief measure to uplift the economy which is witnessing slump.

"We had expectation that some package would be offered but that was not done. The manufacturing sector, service sector, agriculture sector and even the medical sector was looking for some relief but that was not the talking point of the Prime Minister," Shivakumar told reporters.

However, he maintained that the party would cooperate with the Centre in its fight against COVID-19.

Leader of the Opposition Siddaramaiah said he was "disappointed" that there was no programme announced to improve the economy, which is at the lowest level in 30 years.

"The economy has collapsed. Never ever in 30 years it had witnessed such a downfall. Industries are closing down.

Agriculture in bad shape. poeple have no money. Villages are in distress," the former chief minister said.

He opined that Modi should have make some announcement with regard to economic programmes and assistance to the weaker section.

"Labourers today are on the streets. Their programmes do not touch them. People had lots of expectations which are now meaningless," Siddaramaiah said.

However, he underlined that he does not oppose the lockdown and appealed to the people to support it wholeheartedly.