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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 21: The salaries of doctors under the National Health Mission (NHM) has been hiked to Rs 45,000 in Karnataka, according to Medical Education Minister Dr K Sudhakar.

Addressing the media on Monday, Dr Sudhakar said that the state government will bear the cost of the hike in salaries of the doctors and added that ASHA workers too will get a hike in their pay soon.

Regarding the COVID-19 management in the state, he further said that testing will be increased in the containment zones.

During a meeting chaired by Chief Minister BS Yediyurappa, the Education Minister said that it had been decided that booth level committees will conduct door to door survey for early detection of influenza-like illness (ILI) and severe acute respiratory infections (SARI), and vulnerable persons.

He also implored private hospitals to admit and treat COVID-19 patients and asked them to not be hesitant in admitting pregnant women.

Karnataka on Monday reported 3,648 COVID-19 cases taking the tally to 67,420, informed the state health department.

According to a bulletin issued by the department, the state recorded 72 more deaths due to COVID-19 with the toll at 1,403 while six patients who tested positive for the infection have died due to non-COVID causes, as of Monday. There are 42,216 active cases in the state.

Bengaluru, Jan 30: Karnataka Chief Minister B S Yediyurappa, who reached the national capital on Thursday, said he will discuss the much-awaited Ministry expansion with the BJP high command.

"It's been long that I visited Delhi. I will meet the party national president J P Nadda and Home Minister Amit Shah and take their suggestions on the cabinet expansion," Yediyurappa told reporters.

The chief minister said he will also call on Finance Minister Nirmala Sitharaman and Petroleum Minister Dharmendra Pradhan and discuss about development issues related to Karnataka.

Yediyurappa has been anxiously waiting for the high command's nod to expand his ministry amid intense lobbying by the aspirants.

Opposition parties have been critical of the BJP and Yediyurappa over the delay in cabinet expansion, alleging that he was weak and that the administration had collapsed.

As the chief minister has already made it clear that 11 of the disqualified JDS-Congress MLAs who got re-elected in the bypolls on BJP tickets will be made ministers, lobbying has been on in the party for the remaining ministerial berths.

Currently, there are 18 Ministers, including the chief minister in the cabinet that has a sanctioned strength of 34. Sixteen berths are vacant.