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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, jul 6: With coronavirus cases surging and hospitals saturated with patients, the Karnataka government is setting up intensive care units (ICUs) at COVID Care Centres (CCC) in the state for severe cases needing oxygen, Deputy Chief Minister C N Ashwath Narayan said on Sunday.

Covid Care Centres are usually meant for patients who are asymptomatic or have mild symptoms.

"Initially, 10 ICUs will be set up at every CCC in Bengaluru and in other cities and towns across the state subsequently," Narayan said in a statement in Bengaluru.

The state government has set up CCCs at the GKVK campus, the Haj Bhavan and the Art of Living Foundation campus in the city so far. The government has also set up a more than 10,000 bed CCC facility in BIEC, on Tumkur road, on the outskirts of the city.

"About 100 ICUs will be set up soon at the new CCCs opened at the Bangalore International Exhibition Centre (BIEC), Ayurveda College, and Koramangala Indoor Stadium," said Narayan.

The sprawling BEIC in the city's northwest will soon have 10,100 beds for treating Covid patients and asymptomatic cases from state-run hospitals.

The state government has also relieved all Health Department employees from administrative and non-medical duties to depute them at the CCCs.

On complaints about the poor quality of food served to Covid patients and the medical staff, Narayan warned the vendors of cancelling their contracts if they did not supply good quality food as per the guidelines.

The minister also directed the Health Department to ensure adequate supply of drugs and medical equipment to all CCCs and state-run hospitals for treating Covid patients.

With a record 1,925 new cases reported on Sunday, the state's tally touched 23,474, including 13,251 active after 9,847 were discharged (including 603 on Sunday), while 372 succumbed to the infection since March 9, with 37 more deaths on Sunday.

Of the total cases across the state, Bengaluru accounted for 1,235, taking its tally to 9,580, including 8,167 while 145 died so far.

Bantwal, Jul 24: Former Union Minister B Janardhan Poojary on Friday said that people need to shed all their misconception regarding COVID-19 and stop taking it so lightly as it is not just any normal disease.

The 83-year-old politician who was tested positive for covid-19, was recently discharged from hospital after recovering completely.

Giving a word of caution, he said, “Earlier also there have been several diseases like Covid-19 and it has been eradicated. Even covid-19 will be eradicated. So, people should not get scared of the disease instead must fight with it”

“Also, covid-19 patients must not be treated like untouchables as those with symptoms may also not mention it due to the fear of being treated badly,” he added.