Harish Poojary murder: Another Bajrang Dal activist nabbed from Gujarat

Bengaluru, Mar 21: Karnataka Deputy Chief Minister CN Ashwath Narayan on Saturday said that all the IT companies in the state have agreed to close their offices and have also allowed some employees to work from home in the backdrop of the coronavirus pandemic.

"IT companies agreed to close their offices and allow employees, except for those discharging essential services, to work from home during a video conference with companies' representatives yesterday," said Narayan.

The Deputy Chief Minister said a circular regarding it will be issued soon.

Kozhikode, Feb 28: Nearly 200 Umrah pilgrims from Kerala were deboarded from their flights to Saudi Arabia from Calicut international Airport here on Thursday after the gulf nation enforced a temporary ban on foreigners seeking to visit the holy cities of Makkah and Madina, following coronavirus scare.

Saudi Arabia halted travel to the holiest sites in Islam over fears about a viral epidemic just months ahead of the annual hajj pilgrimage, a move that came as the Mideast has over 240 confirmed cases of the new coronavirus.

According to Airports Authority of India officials, as many as 84 of passengers from the Saudi Airlines and 104 from the Spice Jet Airlines were denied permission to board the flights and travel to Saudi Arabia.

However, other passengers bound to Jeddah were permitted to fly, they said.

A private tour operator here said two batches of 40 pilgrims each were denied permission to travel to Makkah to perform Umrah on February 27.

Umrah is an Islamic pilgrimage that can be performed at any time of year.

"The pilgrims were denied entry by the two airlines, Spice Jet scheduled at 05.30 hrs and Saudi Airlines at 1130 hrs," Naiful Akbar, a travel agent said.

The Airport Authority of India sources said, "the passengers were asked to alight by the Spice Jet airline staff following an instruction received by them."

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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