Vehicle transporting meat torched in Belagavi

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, June 23: Karnataka Congress chief D K Shivakumar has urged his party colleagues to be active on social media to counter the propaganda of Bharatiya Janata Party.

Speaking to media persons, the KPCC president said that no more than 20 out of the 68 Congress MLAs are active on social media.

“All those MLAs who are doing well need to be projected. We want leaders, not mere followers. They all should be the face of Congress in Karnataka. Party should not depend on just my face or Siddaramaiah’s,” he said.

Shivakumar’s diktat has resulted in the party’s social media unit scrambling to get leaders to create their accounts.

“We’re pressuring all the party MLAs and leaders. We’re asking their personal assistants or gunmen to operate their accounts if they are not savvy with social media,” KPCC social media chief A N Nataraj Gowda said.

He pointed out that the 20 MLAs who are active on social media include U T Khader, Dinesh Gundu Rao, Priyank Kharge, Krishna Byre Gowda among others.

“We’re also trying to get the accounts verified of those who are beginning to get active. For example, it was only recently that we got the accounts of S R Patil and Vijay Singh verified,” Gowda said.

Tapping the full potential of social media is crucial for the Congress because the BJP has found much success in reaching out to voters through various online platforms.

In fact, ahead of the 2018 Assembly elections, the Congress found that there were 10 ministers and some 40 MLAs who had turned a blind eye towards social media.

Shivakumar said he was also working on putting in place a system in the party under which all developments related to the state and country will be communicated to all party leaders at 10 am every day.