Rahul Gandhi likely to tour coastal Karnataka on March 20, 21

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jun 5: A COVID-19 patient, who was admitted to Victoria hospital, has recovered from the disease after he was administered convalescent plasma therapy.

He is the second patient in the state who has recovered from COVID-19 after the therapy.

"I am happy to inform the second plasma therapy patient has recovered and shifted out of ICU. This middle-aged patient was admitted in Victoria hospital ICU with severe COVID-19 illness and was also diabetic with poor sugar control," Dr Vishal Rao, HCG Hospital Bengaluru said.

"The patient received convalescent plasma on May 27, since then there was steady improvement in patient's condition and was taken off high flow nasal oxygen on June 2, 2020, and is at present on a minimal oxygen, shifted toward yesterday. With the rapid recovery we hope to discharge the patient soon," he said.

Speaking further, Rao said: "This is a significant improvement and reassuring. We hope to see him recover completely and will closely monitor the condition going forward to send the patient from ward to home."

In Karnataka, 4,320 coronavirus cases have been reported including 1,610 cured/discharged/migrated and 57 deaths, according to the Ministry of Health and Family Welfare. 

Bengaluru, Feb 23: The sleuths of Custom Department have seized ephedrine worth Rs 5 Crore in courier terminal of Air Cargo complex in Kempegowda International Airport (KIA), the department said on Sunday.

Customs Joint Commissioner M J Chethan, in a statement, said that Central Intelligence Unit, Air Cargo Complex, scanned the package while verifying export consignments and found concealment of some powder. 5.04 kg of Ephedrine worth Rs 5 crore was packed in polythene pouches and concealed between cardboard layers of wedding invitation cards.

Detailed examination of the Wedding cards revealed banned drugs hidden between 43 wedding invitation cards in the package that also contained a few clothes.