Kashi Mutt pontiff Sudheendra Tirtha Swami dies at 90

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 25: In what is suspected to be the second COVID-19 death in Karnataka, a 70-year-old woman from Gouribidanuru, who was under house quarantine for the last one week has died at Rajiv Gandhi Hospital for Chest Diseases.

The woman, who had recently returned from the Mecca pilgrimage developed fever on Tuesday afternoon. She was rushed to hospital, where she died on Wednesday morning.

Health and Family Welfare officials said that the throat swab sample of the woman had been sent to the laboratory for testing and the result was expected to come by afternoon.

Since last week, at least three cases of COVID-19 positive had been reported in Gouribidanuru in Chikkaballpura district, about 80 kms from Bengaluru.

Most of the suspects and confirmed cases had returned from Makkah pilgrimage. Even the deceased woman was one of them and had been advised house quarantine.

On Tuesday morning, she developed fever and was shifted to Gouribidanur hospital and later to Chikkaballapura hospital. By evening, she was moved to Rajiv Gandhi hospital, where she died on Wednesday morning.

The Chikkaballapura district administration has proclaimed prohibitory orders in the locality. They have also taken the woman's family members for testing.

Mangaluru, Jun 12: A huge crowd gathered for the grand opening of the newly built 175-metre-long two-lane bridge across Phalguni River on National Highway 169 near Gurupura on the outskirts of the city today.

Even as the photos of the bridge inauguration ceremony went viral on social media, netizens took the elected representatives and the district administration to task for flouting safety norms at a time when the coronavirus cases are continuing to mount in coastal Karnataka.

The bridge was completed in a record time of 15 months. Dakshina Kannada MP and State BJP President Nalin Kumar Kateel and district in-charge Minister Kota Srinivas Poojari inaugurated the bridge in the presence of Mangaluru City North MLA Y. Bharath Shetty and others.

The bridge has come as a breather to thousands of travellers between Mangaluru-Moodbidri-Karkala on the busy NH. The age-old steel bridge had become dilapidated and was a cause for concern for road users. The highway is also under the process of getting widened to four lanes.

The bridge was constructed at an estimated cost of Rs 30 crore by contractor Sudhakar Shetty of Mugrodi Construction. Work started in February last and the contractor had time till February next.

While the two-lane carriageway is 16 metres wide, the bridge has 2.5-metre-wide pedestrian paths on both the sides. New approach roads of 500 metres each were also part of the project.