‘Why job? Join anti-CAA protest, eat free Biryani’: Dubai’s NRI employer Gokhale’s response to job seeker Abdulla

Bengaluru, May 23: SSLC and PUC students residing in containment zones will not be able to write the exams scheduled to be held in June and July, respectively, but will be given opportunity to write the supplementary examination and treated as fresh candidates.

Primary and Secondary Education Minister S. Suresh Kumar announced this at a press conference on Friday.

In turn, officials in the Department of Primary and Secondary Education will start collecting the list of students in containment zones. However, they are worried since the list of containment zones is dynamic and a particular locality can be declared a containment zone even the night before the examination.

“If any examination centre is located in the containment zone, then we can change the centre and move it to a non-containment zone. However, if a student resides in a zone that is declared containment zone just before the exam, there is no option but for the person to skip the exam,” an official said.

Officials of the department are worried about another scenario as well. “There is a chance that midway through the examination, an area is becomes a containment zone. Then some students may write a few papers and give the rest a miss. Implementation at the district- and block-levels will be a challenge,” said an official.

Sources said that the department is working out several situations that may arise and trying to work on providing practical solutions to the students.

Around 5.98 lakh students have registered for the second pre-university English examination that is scheduled to be held on June 18. As many as 8.48 lakh students have registered for the SSLC examination scheduled to be held between June 25 and 4 July. Currently, there are 261 containment zones in Karnataka that have 5.49 lakh people residing in these zones.

Meanwhile, the Karnataka Secondary Education and Examination Board has decided to ensure that only 18 students are seated in a classroom to write the SSLC examination. This is to ensure that social distancing is maintained in the exam hall.

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