Cases against 2,806 Hindus, 341 Muslims withdrawn during Cong rule in Karnataka

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, May 15: Mohammed Kana, son of late Ismail Kana and grandson of late Dr M S Bapanad Mulki passed away in Riyadh, Saudi Arabia due to heart attack on Thursday. He was 57.

Hailing from Mangaluru, Mohammed Kana was working in Saudi Arabia for past 30 years. He is survived by his wife, son and a daughter.

He was involved in various social and welfare activities in India and Saudi Arabia. His tragic demise has left huge vacuum in his family and community at large.

Bengaluru, Jun 24: Dr K Sudhakar on Wednesday held a video conference with senior officials to review the preparedness for conducting of SSLC examinations safely which is beginning from Thursday.

"8,48,203 students will appear for the SSLC examination starting tomorrow in 2,879 centres across the state. All the guidelines issues by state government must be followed strictly" Sudhakar said in the meeting.

"It is the collective responsibility of officials of all departments to ensure that every student is safe, from the time he or she leaves home for the exam centre and returns home after the exams. The vehicles used to ferry students, where public transport is not available, must be sanitised properly. The surroundings near exam centres, exam halls, toilets must be sanitised properly. Social distancing must be maintained in the exam hall and mask must be provided to all students," he said.

The minister also said that since the students have been asked to arrive at exam centre at 7:30 in the morning, a small biscuit packet must be provided to each student so that they don't feel hungry during the exam and till they return home after the exam.

"Thermal scanning of every student should be done before allowing inside the exam hall. In case there is fever those students must be made to write exam in separate room. Separate exam halls must be arranged for students in quarantine areas and if it's not feasible they must be allowed to write exam in September. District administrations must disseminate information about precautionary measures taken to build confidence among parents," the minister said.

Sudhakar instructed the officials to work in coordination with the Education Department and other departments.

Stating that there are 458 containment zones in Bengaluru, the minister asked the officials to be extra cautious in these areas and make arrangements to ensure health department staff can take students to the nearest health center if anybody is found ill during the exam.

Education Minister Suresh Kumar, Additional Chief Secretary Javed Akhtar, Education Secretary, Secretary of Medical Education Department, BBMP officials, Health Experts and others were present.