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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Thiruvananthapuram, Feb 6: The 105-year-old Bageerathi Amma who scripted history when she appeared for her fourth standard exam in last November becoming the oldest learner of the Kerala State Literacy Mission has passed her exam with 74.5 per cent marks.

This grandmother from Parakulam in Kollam district of Kerala Bageerathi Amma has six children and 16 grandchildren.

Speaking to news agency ANI, CK Pradeep Kumar, district co-ordinator of State Literary Mission said on Wednesday, "Bageerathi Amma has passed her exam with 74.5 per cent marks. It is really an inspiration for others to follow her and continue their education," he said.

Ms Bageerathi had to stop her education at the age of nine when she was in Class 3 as she had to take care of her younger siblings.

Her yearning to continue her studies was fulfilled with the help of officials of the Literary Mission who helped her to realize her dreams. She scored 205 marks out of a total of 275 in the fourth standard equivalency examination.

The Kerala State Literacy Mission Authority is an autonomous institution under the General Education Department, Government of Kerala.

The programme aims to develop literacy skills through continuing education, provide chances of each and everyone interested in learning, enable the learners to make use of their learning in their daily life and ensure Secondary-level education to the whole of Kerala.

The main beneficiaries of this programme are illiterates, neo-literates, school drop-outs and those interested in lifelong education.

Mangaluru, May 15: In a shocking development, five residents of Udupi district, who recently came from United Arab Emirates today tested positive for covid-19.

As many as 49 passengers among over 175 repatriates who were brought from Dubai to Mangaluru International Airport on May 12 were from Udupi district.

Hence they were quarantined in Udupi district and their throat swabs were sent for testing on the same day. Today, five of them obtained positive report. They were today shifted to TMA Pai covid-hospital from their hotel rooms.