U T Khader assures to expedite efforts for Mangaluru-Riyadh direct flight

Bengaluru, Mar 27: Karnataka has recorded the third death due to the Covid-19 virus. It is a man from Tumakuru with a travel history to Delhi. He had been put in isolation at the District Hospital in Tumakuru on March 24.

His travel history indicates that he travelled to New Delhi by the Sampark Kranti Express (Coach S6) on March 5 along with 13 members. They reached Hazrat Nizamuddin station in New Delhi on March 7 and went to the Jamia Masjid and rented an room at a lodge nearby.

He began the return journey to Karnataka by the Kongu Express on March 11 in Coach no. S9. On March 18, he developed cough and fever and visited a private hospital the next day. He was referred to the District Hospital in Tumakuru but on March 24, he left the hospital against medical advice and went to a private medical facility. He was referred back to the District Hospital, where he was put isolation.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, Jan 10: A person has been booked for forwarding provocative message on WhatsApp against the Dakshina Kannada Khazi Twaqa Ahmed Musliyar.

According to police, the accused Hassan forwarded provocative messages against the Khazi in a WhatsApp group on December 31, following which he was booked under several sections of Indian Penal Code (IPC).

Mangalore North Police are looking into the matter.