Hundreds take part in Mangalore International Open FIDE rated chess tournament

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Mar 31: With the Dakshina Kannada district administration relaxing the lockdown from 6 am to 3 pm to purchase essential commodities, panic-stricken citizens rushed to the shops early in the morning itself.

The citizens had formed a serpentine line in front of shops and supermarkets in different parts of Mangaluru and on the outskirts of the city to purchase their requirements.

As a precautionary measure, many were seen wearing masks.

“In spite of waiting in a long queue to purchase, we are not able to get the required essential commodities. Why can’t the district administration ensure enough stock of commodities in the shops and supermarkets,’’ asked a customer who had stood in a queue outside a supermarket at Chilimbi.
People were seen crowding outside markets at Kankanady, Mallikatte, Urwa and Central Market, violating the purpose of social distancing.

Consequently, vegetable prices have increased in the markets and shops. This is despite abundant stocks being available in these markets.

Trucks had unloaded the vegetables at Central Market on Sunday, according to sources. The prices of onions are skyrocketing yet again and is sold from Rs 50 to Rs 55 while a kg of carrot costs Rs 100.

"Why can’t the authorities check the rise in the price of vegetables and ensure that the poor are not inconvenienced," asks Lakshmi, a housewife.

Bengaluru, Apr 1: After fake sanitisers and masks, Central Crime Branch (CCB) police have busted another racket and seized fake thermometers worth Rs 8 lakh, it said in a statement on Wednesday.

Based on credible information, police conducted the raid on Prajval Surgical and Scientific store located on the first floor of a commercial building in the first block, Rajajinagar. They arrested store manager Keshavan N, 32, a resident of Kurubarahalli.

The police have seized 70 fake infrared forehead thermometers and 60 batteries used in these thermometers. They were worth around Rs 8 lakh as per the price they charged customers for each thermometer.