104-year-old Umrah pilgrim from Dakshina Kannada dies in Makkah

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, June 21: An assistant sub-inspector of police who was undergoing treatment for COVID-19 infection in city-based Victoria hospital passed away on the intervening night of Saturday and Sunday as he did not respond to the treatment for coronavirus.

The 59-year-old ASI was attached to the Wilson Garden traffic police station in Bengaluru. He tested positive for coronavirus on June 18 and was rushed to the COVID ward in Victoria hospital on June 19. He had fever for the last four days. His wife and two children have been quarantined. According to the police, the station has not yet been sealed down and no policemen have been quarantined.

The Wilson Garden ASI is the third Bengaluru police personnel to die of COVID-19 in the last one week. Earlier, an ASI from the VV Puram traffic police station had died undergoing treatment. On Saturday morning, a head constable from the Kalasipalya police station who was admitted at Victoria hospital passed away. The series of deaths in the police department has created fear among other policemen across the city.

One the other hand, dozens of policemen were tested positive in different parts of Karnataka today including 21 from two police stations of Bengaluru. 

Around 15 policemen from the Kalasipalya police station and five policemen from the Ashok Nagar traffic police station tested positive for coronavirus on Sunday.

In Kalasipalya, three ASIs, head constables and police constables have tested positive. In Ashok Nagar traffic police station, a probationary sub-inspector, an ASI, two police constables and a lady constable tested positive for the virus.

One more police constable working in Bandepalya police station also tested positive. Seven policemen who were in his primary contacts have been quarantined. BBMP officials have begun the process of fumigating the station premises and its surroundings.

Mangaluru, Jul 4: In the wake of mounting coronavirus cases in Dakshina Kannada, all jewellery shops district will be closed for five days from July 5 to July 9.

The decision was taken by the Dakshina Kannada district unit of Jewellers’ Association.

All the jewellery shops including corporate jewellery shops in Manglauru and other parts of district will remain closed for five days, a media release said.