BJP conspiring to oust me, says Chief Minister Siddaramaiah

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, Apr 18: A case has been registered against a man for spreading communal hatred by sharing objectionable and sensitive posts on social media, Commissioner of Police Harsha said here on Saturday.

In Twitter Mr Harsha wrote, ” We have registered a case against a person claiming himself as Vishwa, Mangalore for making Statements promoting enmity and hatred between communities on social media with crime number 46/20 at the south police station under 505 IPC.”

He further warned, “We will not spare anyone trying to disturb communal harmony in the district.”

Bengaluru, Apr 16: The Karnataka government on Wednesday identified 14 departments as essential and asked all its employees to attend work during the extended period of lockdown to check coronavirus spread in the state.

According to a circular issued by Chief Secretary TM Vijay Bhaskar, all classes of officials/employees in these departments must attend to their work.

The departments are: Health and Family Welfare, Medical Education, Home, Revenue, Rural Development and Panchayat Raj, Urban Development, Food, Civil Supplies and Consumer Affairs, Information and Public Relations, Transport, Energy, Personnel and Administrative Reforms (e-Governance), Finance (including treasuries), Animal Husbandry and Fisheries and Forest, Ecology and Environment.

In all other departments, only Group-A officers have been directed to report for duty.

However, those visually-impaired or physically-

handicapped are exempt from work, the circular said, adding that this norms will be valid till April 19.