Rama and Seetha also ate beef, says Nidumamidi seer

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Feb 21: A young woman in Bengaluru was detained today for holding a placard saying ''Free Kashmir'' at a demonstration in the city to protest against the arrest of college student Amulya Leona who had raised pro-Pakistan slogans at an anti-CAA rally a day ago.

The arrested has been identified as Ardra Narayan, a 20-year-old student of an engineering college at Malleshwaram in the city's western suburb.

"Ardra Narayan is being questioned at the Silver Jubilee Park police station after she was whisked away from the spot and detained for holding the placard with ''Free Kashmir'' written on it," Bengaluru Police Commissioner Bhaskar Rao said.

On a complaint by Sri Ram Sena activists, who were protesting against Amulya at the venue, the police booked a suo moto case against Ardra under sections 153A and 153B of the IPC (Indian Penal Code) for disturbing peace and harmony.

The placard also displayed ''Give Us Liberation'' and ''Freedom from India'', a Sri Ram Sena activist alleged.

The development comes a day after Amulya, 19, was arrested under section 124A of the IPC for sedition and jailed for 14 days for allegedly shouting "Pakistan Zindabad" at the anti-Citizenship Amendment Act (CAA) rally at Freedom Park in the city centre on Thursday.

"We are trying to ascertain if there is any connection between Amuly and Ardra though she was alone at the spot holding the placard," Assistant Commissioner of Police (ACP) R. Chandrashekar told news agency.

Udupi, Feb 11: The three patients, including a child, who were suspected to be suffering from coronavirus were discharged from hospital on Monday after the throat swab sample test proved negative for the infection.

The throat swabs of three persons, who were admitted to a district government hospital in Udupi with symptoms of fever on Friday, were sent to Bangalore Medical College and Research Institute for testing of coronavirus.

The trio had returned from China, 15 days ago.

The 30-year-old man from Kaup taluk had been to China on personal work and had returned to Udupi, 15 days ago. He had symptoms of fever, throat pain and cold and he was suggested to get admitted to hospital.

He was treated in the isolation ward.

A family from Mandarthi had gone on a tour to China and had returned 15 days ago. The father and son, who had complained of fever, were kept under observation at the isolation ward in the district government hospital.