Elderly woman mauled to death by stray dogs; another injured

Bengaluru, Jun 9: A 42-year-old founding director of an engineering consultancy firm lost Rs 65,000 to online fraudsters who posed as representatives of a mobile service provider and lured him with the offer of a fancy number recently.

Asif (name changed) received a text message on May 19, informing him that a platinum number, 9099999999, was available and interested people could dial a mobile number to avail it.

“Asif, who runs a mechanical, electrical, plumbing (MEP) engineering consultancy near Shivajinagar, decided to get the fancy mobile number. He called the number and the receiver said they would generate an invoice for his request. After a fake invoice for Rs 64,900 was generated, Asif paid the money through online transaction that day. Asif waited for two weeks for the SIM card with the fancy number to reach him,” an officer said.

East CEN Crime police registered a case of cheating under section 420 of IPC and sections under the Information Technology Act after Asif lodged a complaint on June 6.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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