Government trying to keep Lokayukta post vacant: Jagadish Shettar

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, May 21: The coastal district of Dakshina Kannada today recorded six fresh covid-19 positive cases. With this the total cases reported in the district so far rose to 61.

It is learnt that all the six new covid-19 patients are those who had returned to Mangaluru from Dubai on May 18. 

Al the six patients are male. Among them two people aged 44 years and three others aged 35, 42, 60 are residents of Dakshina Kannada. Another one is 29-year-old from Kalaburagi. 

They were under institutional quarantine after their return. After their throat swab tests confirmed the disease, they were shifted to covid-19 hospital in the city.

Bengaluru, Apr 12: Former chief minister H D Kumaraswamy on Sunday appealed to the Central government to announce the rent rebate scheme for the benefit of tenants in the wake of economic activities coming to a grinding halt due to COVID-19 related lockdown.

In a series of tweets, Kumaraswamy said people are facing difficulty in paying rent as usual and hence the rent rebate scheme should be initiated.

"Many countries have already announced rent rebate scheme for tenants during COVID19 emergency. It is surprising that Indian Govt has not announced any such relief even to residential tenants. I urge the PM to immediately come to the rescue of everyone living in rented housing," Kumaraswamy tweeted.

He said a considerable workforce and students in metropolitan cities live in hostels and rented houses.

As all economic activity has come to a grinding halt, it is very difficult for them to pay the rent as usual.

The Prime Minister must announce rent rebate scheme, he added.

Highlighting the plight of the tenants, Kumaraswamy said, "If the landlords insist on rent, the tenants cannot even go searching for new accommodation due to the emergency. Hence the government intervention is essential. The PM must announce a comprehensive national rent rebate scheme for COVID-19 emergency."