Media's role in homestay attack being looked at: ADGP

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangalore, Jan 12: City police on Sunday arrested five people for their alleged involvement in a Rs 50 crore fraud by promising people higher monetary returns.

Police said that the arrested persons are Manjunath Nayak, a resident of Derebail; Denzil Mascarenhas, a Konchady resident; Ashok Naik, a Derebail resident; Vikas Nayak and Vishwanath Naik both residents of Bengaluru were arrested.

The arrested were employed in the ‘Speak and Group’ concern, started by Dhanush M K of Kundapur along with his friends. The firm had managed to collect huge sums of money from people, including NRIs by promising monthly four percent returns on their investment. The employees managed to entice people by showing them a few insurance schemes claiming higher returns.

New Delhi, Jun 25: The Central government submitted before the Supreme Court on Thursday that the remaining class 10 and 12 CBSE exams, which were earlier rescheduled to be held between July 1 to July 15 in view of the COVID-19 pandemic, have been cancelled.

Solicitor General Tushar Mehta, appearing for the Centre and Central Board of Secondary Education (CBSE), informed a three-judge bench headed by Justice AM Khanwilkar that the remaining class 10 and 12 CBSE exams scheduled to be held in July have been cancelled.

Delhi, Maharashtra, and Tamil Nadu have conveyed their inability to conduct the examinations, Mehta said.

The bench asked whether class 12 students were being given the option to either get marks on the internal assessment basis or appear for an exam later, to which the Mehta responded in the affirmative.

CBSE exams for class 10 students stand cancelled, Mehta said and added that they don't have to give any examinations. Mehta further submitted that as soon as conditions are conducive, CBSE exams for class 12 students, who opt for it, will be conducted.

The apex court was hearing a petition, filed by advocate Rishi Malhotra, seeking directions to cancel the remaining CBSE exams in view of the health risk of coronavirus infection. The apex court was also hearing a similar petition regarding the ICSE exams.

Indian Certificate of Secondary Education (ICSE), through its counsel Jaideep Gupta, also informed the court that it will also cancel the class 10 and 12 board exams. However, it submitted that it does not agree to give the option to students to give the exam later.