A mad man governing Karnataka: Eshwarappa

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 26: The state government today hinted that places of religious worship belonging to Hindus will be allowed to reopen from June 1, keeping social distancing and other norms in place.

In principle, the government has decided to open temples coming under the Muzrai department after Lockdown 4.0 ends on May 31. The decision was taken at a meeting chaired by Chief Minister BS Yediyurappa.

“Movement of people on air and rail has started. We have been receiving repeated pleas from devotees that temples should be opened. When this was discussed with the CM during a review of the Muzrai department, it was decided that temples can start from June 1,” Muzrai Minister Kota Srinivas Poojary told reporters. 

Poojary said all day-to-day activities will be allowed in temples. “But religious fairs and ceremonies will not be permitted,” he said. 

Mosques and churches

Asked whether his government will allow opening of mosques and churches too from June 1, he replied that they don't come under his Muzrai dept.

Howvever, government sources said this may apply to mosques, churches and other places of religious worship as well. However, this decision will be subject to whether or not the Centre will allow places of religious worship to be open for the public after Lockdown 4.0, an official said. 

All places of religious worship have been closed for the public ever since Karnataka enforced a state-wide lockdown on March 24 to contain COVID-19.