Udupi: Seers disappointed as PM Modi refuses to visit Krishna Mutt like CM Siddaramaiah

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, Dec 15: A bandh-like situation prevailed in many parts of Dakshina Kannada on Wednesday as thousands of people closed their shops and business establishments to support the ant-NRC protest at Adyar Kannur in Mangaluru.

The protest is jointly being organised by the various Muslim organisations of Dakshina Kannada and Udupi district under the leadership of Muslim Central Committee against the Citizenship (Amendment) Act (CAA), National Register of Citizens (NRC) and National Population Register (NPR) besides the “categorical mistreatment” of Muslim community at the hands of the police across the country including in Mangaluru.

In Mangaluru city, even though people woke up to a normal Wednesday, by afternoon most of the Muslim-owned shops were closed.

Muslim dominant areas of the district such have observed half-day bandh. In regions like Ullal, Thokkottu, Bantwal, BC Road, Kalladka too a majorty of the Muslim business establishments remained shut afternoon.

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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.