Three fishermen go missing since July 23

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Feb 4: Final chance to present evidence and record eyewitness statements with the Deputy Commissioner of Udupi G Jagadeesh regarding the December 19 violence will be held on February 6 between 1100 and 1300 hrs.

Eyewitness and evidence presenters can depose at the Assistant’s Commissioner’s Court Hall in the Mini Vidhan Soudha in the city.

The Deputy Commissioner said that no evidence would be accepted after this last round of public hearing.

Newsroom, Jun 2: The government of India has announced operation of another 20 special flights to repatriate stranded NRIs from Kingdom of Saudi Arabia under Vande Bharat Mission.

All the repatriation flights will take off from three major airports – Dammam, Riyadh and Jeddah – between June 10 and June 16. Most of the flights will land in Kerala.

The first flight from Saudi Arabia to Karnataka in the new schedule will be operated on June 11. It will take off from Jeddah with passengers from both Kerala and Karnataka. After landing in Kozhikode it will continue its journey to Bengaluru. 

The next three flights  –  Dammam to Bengaluru on June 12, Jeddah to Bengaluru on June 13 and Riyadh to Bengaluru on June 15 – will directly fly to Karnataka. 

Even though thousands of Mangalureans are stranded in Saudi Arabian cities due to lockdown, the government has not announced any flight to Mangaluru International Airport.

The following are the newly announced flights from Saudi Arabia to India: