Chikkamagaluru reclaims ‘corona-free district’ tag as all 16 patients discharged

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Hassan, Mar 13: In what could have been a major tragedy, an under construction flyover across Hassan-Mangaluru railway level crossing, near the new KSRTC Bus stand here collapsed today.

Fortunately no casualties occurred despite six concrete beems of 50 feet height, collapsed and broke into pieces.

The much awaited project was completely neglected by the successive governments for over a decade due to politics.  It was sanctioned eight months ago.

The Rs 42 crore project was taken up by a joint venture between state, center and South Eastern railway. The contractor or the Engineer were not present when the incident occurred.

Blaming the contractor, the locals alleged that poor quality of work led to the incident. No contractor or engineer was present even during construction, they added. Siddaiah, who runs an eatery near KSRTC bus stand said that it could have been a major tragedy if people were underneath the flyover when it crashed. The incident should be probe and the contractor should be punished, he added.

Mangaluru, May 24: A 42 –year-old man who was the secondary contact of P 1233 has been tested positive for COVID 19, in Dakshina Kannada on Sunday.

The man is being treated at the designated COVID-19 hospital in Mangaluru. With this, DK has registered a total of 66 positive cases with 34 active cases.

P 1233 was a 30-year-old man who had inter-state travel history from Maharashtra, said DK DC Sindhu B Rupesh.

The news case took the district's covid tally to 66 and 34 of them are active cases.