Hand-made artifacts showcase India's culturally enriched regions

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Apr 19: The covid-19 being spread by the novel coronavirus has claimed a life in the coastal district of Dakshina Kannada.  

The victim, a 50-year-old woman from Bantwal taluk, breathed her last at Wenlock Hospital today morning. 

She was rushed to a private hospital yesterday after she developed breathing problems. Then she was shifted to Wenlock Hospital's block for suspected coronavirus patients, and placed in the intensive care unit (ICU).

Her throat swab was collected the same day and sent for testing for coronavirus. However, today morning her condition worsened and she passed away.

The report was received on later on Sunday afternoon, which confirmed that she had contracted coronavirus.

The woman's family members including her husband, son and mother-in-law have been placed under quarantine. It is learnt that her mother-in-law's condition is serious and she has been admitted to the ICU.

The throat swabs of all the three family members have been sent for coronavirus test. According to sources, the woman's son had come from Dubai recently.

Meanwhile, a 30-year-old woman from Uppinangady, who is undergoing treatment in a hospital, today tested positive for the covid-19.

With the confirmation of two new cases, the total number of reported covid-19 cases in Dakshina Kannada reached 15. Out of which only two case are currently active and 12 have been discharged. Another one passed away.

Davanagere, Apr 26: Amid the national lockdown imposed by the Centre to check the spread of coronavirus, social distancing norms were flouted as BJP MLA from Honnali -- MP Renukacharya -- held a meeting of ASHA workers on Thursday.

The workers were present in large numbers and no distance of at least one metre between the workers was maintained during the meeting.

However, the workers were seen wearing masks at the meeting but violating the norms of social distancing.

Social distancing is one of the measures that can help people avoid contracting the highly contagious coronavirus.

According to the Union Ministry of Health and Family Welfare, Karnataka has a total of 489 positive COVID-19 cases of which, 153 patients have recovered and 18 patients have died due to the deadly virus.