Sehwag replies to Kargil martyr’s daughter's anti-ABVP post

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Kannur, Jan 23: A member of Rashtriya Swayamsevak Sangh has been arrested for attempting to create unrest in Kerala by hurling crude bombs at RSS office and police picket. The miscreants had reportedly planned to pass the blame on others.

The bomb attack took place of January 16 in Kerala’s Kannur. The accused Prabesh, an RSS hardliner, was arrested from Coimbatore, Tamil Nadu.

According to the Kerala police Prabesh hurled steel bombs towards the police picket in front of Kathirur Manoj Smrithi Kendram, an RSS office.

"He threw bombs during the wee hours of January 16 morning. Following the arrest he has confessed that his aim was RSS office. Kannur, being politically sensitive region, any attack on political party offices will be regarded as an act by the opponent," Kathirur SI Nijeesh said.

"We had a police picket in the region for a few months now. We are assuming he wanted to create unrest in the area by removing the police from the spot. We could contain the situation because of the CCTV visuals. He was identified immediately after the incident. Following the attack he went to Coimbatore and was hiding there. Our team nabbed him from Coimbatore," he said.

The police have also said that the accused Prabesh had many criminal cases pending against him including those under Explosive Substances Act, 1883. He was nabbed by a team lead by Kathirur SI Nijeesh, CPO Rohith and Vijeesh.

The RSS office in the region is named after Kathirur Manoj a senior karyakarta (worker) who was allegedly killed by the CPI(M) activists in 2014. Kathirur Manoj was the prime accused in the attempt to murder of senior CPI(M) leader P Jayarajan in 1999.