‘Restless’ minister U T Khader hospitalized in Bengaluru

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Mar 12: Karnataka on Thursday confirmed another positive case of the deadly coronavirus, taking the total number of infected persons to five in the state.

According to a source from the State Health Department, the infected person, a 26-year-old patient had recently returned from Greece. He is currently under observation in an isolation ward in a city hospital.

Washington, Jun 11: Observing that historically India has been a tolerant, respectful country for all religions, a top Trump administration official has said the US is "very concerned" about what is happening in India over religious freedom.

The comments by Samuel Brownback, Ambassador-At-Large for International Religious Freedom, came hours after the release of the "2019 International Religious Freedom Report" on Wednesday.

Mandated by the US Congress, the report documenting major instances of violation of religious freedom across the world was released by Secretary of State Mike Pompeo at the State Department.

India has previously rejected the US religious freedom report, saying it sees no locus standi for a foreign government to pronounce on the state of its citizens' constitutionally protected rights.

"We do remain very concerned about what's taking place in India. It's historically just been a very tolerant, respectful country of religions, of all religions," Mr Brownback said during a phone call with foreign journalists on Wednesday.

The trend lines have been troubling in India because it is such a religious subcontinent and seeing a lot more communal violence, Mr Brownback said. "We're seeing a lot more difficulty. I think really they need to have a - I would hope they would have an - interfaith dialogue starting to get developed at a very high level in India, and then also deal with the specific issues that we identified as well," he said.

"It really needs a lot more effort on this topic in India, and my concern is, too, that if those efforts are not put forward, you're going to see a growth in violence and increased difficulty within the society writ large," said the top American diplomat.

Responding to a question, Mr Brownback said he hoped minority faiths are not blamed for the COVID-19 spread and that they would have access to healthcare amid the crisis.

Prime Minister Narendra Modi has criticised any form of discrimination, saying the COVID-19 pandemic affects everyone equally. "COVID-19 does not see race, religion, colour, caste, creed, language or border before striking. Our response and conduct thereafter should attach primacy to unity and brotherhood," PM Modi said in a post on LinkedIn in February.

The government, while previously rejecting the US religious freedom report, had said: "India is proud of its secular credentials, its status as the largest democracy and a pluralistic society with a longstanding commitment to tolerance and inclusion".

"The Indian Constitution guarantees fundamental rights to all its citizens, including its minority communities… We see no locus standi for a foreign entity/government to pronounce on the state of our citizens' constitutionally protected rights," the Foreign Ministry said in June last year.

According to the Home Ministry, 7,484 incidents of communal violence took place between 2008 and 2017, in which more than 1,100 people were killed.