Mangaluru Mayor clinches gold at national karate championship

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 17: Former health minister U T Khader demanded that the authorities carry out a scientific analysis of the five deaths that occurred due to Covid-19 in Dakshina Kannada. 

“The number of fatalities vis-à-vis the number of positive cases in the district is worrying, and the district administration and health department should not take the matter lightly. Lapses, if any, in dealing with the co-morbidity factors should be addressed, lest it become a major health challenge,” he warned.

Addressing reporters on Saturday, Khader, said only carrying out such types of analysis will help the health department combat the spread of the novel coronavirus in the future. “At present, the only data available with the health authorities here and in the state war room, is the number of people tested and number of positive cases,” Khader said.

“Any strategy to combat Covid-19 must be built around scientific analysis of causes of how the disease is spreading and to do so, concrete efforts must be made to find the source of the cluster at the First Neuro Hospital in Padil. A analysis of reasons that caused the deaths, will also come in handy for the authorities to prepare suitable advisories for the people, who in turn could take informed decisions,” Khader noted.

Alappuzha, Dec 19: A Hindu couple, Anju and Sharath tied the knot at Cheruvally Muslim Jamaath Committee situated in Alappuzha district of South Kerala on Sunday.

The marriage took place as per Hindu rituals.

DH had earlier reported that the Jamaath Committee will conduct the marriage ceremony considering the request of the bride's mother, who hailed from a financially weak background.

Kerala Chief Minister Mr Pinarayi Vijayan shared the picture of the marriage on his social media post citing it as yet another instance of communal harmony in Kerala.