Hindutva group demands Modi's apology for remarks against gau rakshaks

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, Mar 10: Three more positive COVID-19 cases have been confirmed in Karnataka taking the tally to four, state Health Minister B Sriramulu on Tuesday informed.

"Their family members have been isolated and their health is being monitored. I urge citizens to take precautionary measures and co-operate in preventing the spread of this infection," Sriramulu said.

As on Monday, the national tally of persons affected by the coronavirus is 45.

According to the Indian Council of Medical Research (ICMR), in the past 24 hours, one positive case from Kerala, two from Pune, and three from Bengaluru have been confirmed.

Apart from the ICMR; National Institute of Virology in Pune; 51 Virus Research and Diagnostic Laboratories; and National Centre for Disease Control, New Delhi are carrying out tests for COVID-19.

Kalaburagi, Apr 25: In order to make people aware about the precautionary steps required to be taken in order to contain the spread of coronavirus, Muslim clerics here are making announcements from mosques after 'Azaan' urging people to follow the government guidelines to keep infection at bay.

Speaking to news agency, Ateeq Ur Rahman Ashrafi, All India Imams Council Karnataka's state president, said, "Under our council, there are around 80 mosques and after Azaan we are spreading awareness about COVID-19. I also appeal to other mosques to make such announcements and follow government guidelines."

This year, due to the spread of the virus, Muslim clerics have requested people to offer prayers inside their homes and avoid any kind of social gathering.

The country is under lockdown till May 3. All religious places including mosques have been closed to stop the transmission of the highly contagious virus.