High alert sounded in Karnataka following arrest of suspected terrorist

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

May 6: Congress general secretary KC Venugopal on Tuesday termed as "inhumane" the government's decision to "impose excessive costs" on NRIs and expatriates for bringing them into the country from COVID-19-affected nations.

He demanded that the central government fly in the poor and vulnerable free of cost while charge the others with normal fares instead of high costs.

"The central government's decision to impose excessive costs on NRIs flying in special flights from the Covid-affected countries is an inhumane act," he said in a statement.

Venugopal said it was due to protests by a large number of expatriates and their relatives as well as the general public over the past few days that the central government took the decision to bring back Indian citizens from abroad.

"However, it is cruel that the Central government has taken advantage of this plight of expatriates by increasing the price of air fares up to three times. This is inhumane," Venugopal said in his statement.

He urged the Centre to take urgent steps to provide free travel to the most vulnerable, unemployed, sick and pregnant women and to others on normal fare.

Air India will operate 64 repatriation flights for a week from May 7 while the Navy deployed two ships as India rolled out a massive evacuation plan on Tuesday to bring back thousands of its nationals stranded abroad due to the coronavirus-triggered lockdown.

Those availing the repatriation flights will be charged, Civil Aviation Minister Hardeep Singh Puri told a virtual press conference in New Delhi. A passenger on a London-Delhi flight will be charged Rs 50,000 and on a Dhaka-Delhi flight Rs 12,000, he added.

From the Gulf countries to Malaysia and the UK to the US, the multi-agency operation christened 'Vande Bharat Mission' will see the state-owned airline operate the non-scheduled commercial flights till May 13 to ferry around 15,000 Indian nationals from 12 countries.

Mangaluru, Jul 7: The residents of Bangle Gudde, Mathadagudde area in Gurupura Gram Panchayat in Dakshina Kannada district of Karnataka, where two teen aged children were buried alive, were shifted to safer places.

District officials said on Tuesday that the residents have been provided temporary shelter in Gurpur school, PU college, and hostels, while few others were shifted to Ashraya centers. Total 40 houses out of 180 houses in this area located in the red zone were damaged due to heavy rain.

If the residents want to stay in the rented house, the revenue department is ready to pay a sum of Rs 2,500 towards rent, official sources said.