Mangaluru: Cops seize 5 kg ganja, nab youths at Thokkottu

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Kasaragod, Apr 30: The Kasaragod District Collector Sajith Babu, his gun man and driver has entered in quarantine on Wednesday.

According to sources, the Collector had been asked to go on quarantine after the reports of a journalist, who interviewed him, was tested positive for the virus.

Chief Minister Pinarayi Vijayan at his routine evening press conference revealed the positivity of the journalist.

Ballari, Jan 13: Police on Monday arrested more than 30 Congress activists, including Congress MLA B Z Zameer Ahmad, who were on the way to Ballari to stage a dharna in front of MLA G Somashekhar Reddy's residence after he delivered hate speech during a pro-CAA demonstration a week ago.

Ballari Superintendent of Police SP C K Baba said that Congress MLA B Z Zameer Ahmed has not been granted permission to stage a dharna in front of the Bellary MLA’s residence.

Zameer Ahmed had asked the police to arrest Mr Reddy after he delivered a provocative speech or he will stage a dharna in front of the later's house.

SP said, “Investigations into the complaints pertaining to the provocative speech by Bellary City MLA G Somashekar Reddy is underway. In-charge Dy SP Maheshwara Gouda has taken statements of the complainants and others related to the case. A charge sheet on the same will be submitted to the court soon."

Reddy has been booked for making a provocative speech during a pro-CAA protest here in Ballari last week in which he said that Hindus outnumbered Muslims.

Following the incident police provided high police security to the MLA house and sensitive area in the city.