Not in a position to fight BJP alone; will join hands with others in LS polls: Karnataka Cong chief

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Mar 10: Techies living in a Whitefield apartment block where the city's first Coronavirus patient was residing have been asked to work from home.

The Karnataka government is in touch with the heads of IT and ITES companies, some of which are said to have asked their staff to work from home.

Deputy Chief Minister Dr C Ashwath Narayan, who also holds the IT and BT Portfolio, said the government had directed the companies to explore giving their employees the work-from-home option.

Bengaluru, Jan 22: The Bengaluru Police on Wednesday said that the procedure is being followed to hand-over to the Mangaluru Police a suspect who surrendered before it two days after planting an improvised explosive device (IED) at the Mangaluru International Airport.

"He [the suspect] surrendered before police claiming to be responsible for the Mangaluru airport incident. He is being medically examined and we are preparing procedure to hand him over to the Mangaluru team which is already on their way," Bengaluru Deputy Commissioner of Police (DCP), Chetan Singh Rathore told the media persons.

Aditya Rao surrendered before Bengaluru Police today, days after a bag of IED was recovered from Mangaluru airport. He hails from Udupi and has engineering and MBA degrees.

An investigation team of Mangaluru police is flying to Bengaluru to question him. "Mangaluru city police investigation team is flying to Bengaluru shortly to investigate the developments in connection with MIA case..the team will question the suspect and will initiate further necessary legal action," Commissioner of Police, Mangaluru City, tweeted.

According to the police, the IED was recovered from a bag at Mangaluru airport on January 20. It was later defused in an open field by the personnel of the bomb disposal squad.