Sabarimala row: Hartal called in Kerala after senior Sangh Parivar leader's arrest

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Udupi, May 18: As many as eight fresh coronavirus positive cases have been reported in coastal districts of Udupi and Uttara Kannada. 

No fresh positive case was reported in Dakshina Kannada since yesterday.

According to Health and Family Welfare Department, two men aged 38 and 24 years, an 8-year-old boy and a 24-year-old woman tested positive for coronavirus in Udupi district today. 

All of them were under quarantine after returning from Maharashtra recently. They were shifted to covid-19 hospital for treatment. With this the number of covid-19 positive cases in Udupi district mounted to 15.

Meanwhile, Uttara Kannada district also received a jolt with four more cases. Yesterday it had reported eight cases.

Kochi, Mar 2: The Vatican has rejected the second appeal by Sister Lucy Kalappura -- one of the nuns who protested against rape accused Bishop Franco Mulakkal -- against her expulsion from Franciscan Clarist Congregation (FCC).

In her plea, she had demanded that her version be heard and her expulsion from FCC revoked.

She was expelled from FCC for participating in public protests demanding the arrest of Franco Mulakkal in the nun rape case.

''I got a letter from Vatican which says my appeal has been rejected. But the rest of the letter is written in the Latin language. So after I understand it, I will respond," Sister Lucy told news agency.

''The authorities are contemptuous of those who make such complaints. That is why the letter is written in Latin. Sister Lucy would continue her legal fight in the courts,'' said George Moolechalil, who has been authorised by Sister Lucy to communicate with the media on her behalf.

A petition of Sister Lucy is still pending at Mananthavady Munsif Court at Wayanad that demands that she should not be expelled from the convent where she is staying.