Three teenage college students drown in River Netravati while celebrating birthday

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Madikeri, Jan 16: Income Tax Department officials on Thursday raided the residence of Kannada actress Rashmika Mandanna at Virajpet in Kodagu District on Thursday.

About 10 IT officials arrived at the residence on Thursday at about 1930 hrs and started searching. The officials have been busy conducting the raid for more than three hours now.

I-T sources said that the search and seizure operations were conducted on suspicion that Rashmika Mandanna had evaded taxes.

Mandanna, 23, is a leading heroine and has acted in several Kannada and Telugu films over the last four years. Her most recent film Sarileru Neekevvaru opposite Mahesh Babu is in the theatres now.

She made her debut in Sandalwood with the film Kirik Party, which was a huge success at the box office. She went on to act in several Kannada and Telugu films in the last two years and has become a huge success in the industry. She has acted in Dear Comrade, Sarileru Neekevvaru, Chalo, Geeta Govindam, Chamak, Yajamana, Anjani Putra and Vritra.

She is currently working in the film Pogaru alongside Dhruva Sarja. She has acted in nine movies in the last two years and has also signed several advertising contracts.

Shivamogga, Jun 13: Senior BJP leader and Karnataka Minister for Rural Development and Panchayat Raj, K S Eshwarappa on Saturday opined that during the selection of candidates to the legislative council, the party needs to take into consideration those who helped the party in formation of government in the State.

Speaking to media persons on the sideline of a programme here, he said the party high command would give another surprise while issuing tickets during the MLC election.

Mr Eshwrappa said that party high command will take a call on selecting candidates, but priority should be given to the leader who won on Congress and Janata Dal and then jumped to BJP which helped to form govt under the leadership of B S Yediyurappa.