Goshala members launch hunger strike after thieves take away cow

Bengaluru, Apr 18: With 12 fresh cases of the COVID-19 infection, including one woman, the total number of novel coronavirus cases in Karnataka surged to 371 on Saturday.

The sources said that as many as three new positive cases were reported from Mysuru district, followed by two each from Kalaburagi, Bhagalkote, one each case from Vijayapura, Belagavi, Dharwad, Gadag and Mandya, districts on Saturday.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, May 4: Former Karnataka chief minister HD Kumaraswamy on Sunday said that the health of the migrants who have been allowed to move, should not be jeopardized and appropriate tests must be conducted.

"The task was to send the workers to their places. However, their health should not be jeopardized. This decision made for their benefit should not be a travesty for them. There will also be physical interference on the buses and appropriate tests must be done," said Kumaraswamy.

"The lockdown, which was implemented without any prerequisites, is now loosened without warning. The state government, which has allowed migrant workers to move to the city, has mobilized large numbers of people. By this, the government is playing with their health," he added.

He continued saying that the government should not lose out on an unscientific move that resulted in the loss of thousands of crores of rupees from a custodial lockdown.

"Workers and villages must be sober. The government must take all necessary precautions in this regard," he added.