34% state ministers in India criminals, 97% ministers in Karnataka crorepatis

Mangaluru, Apr 30: Yet another case of covid-19 reported in the coastal city of Mangaluru today.  

The Dakshina Kannada district administration confirmed that a 58-year-old woman hailing from Boluru area in the city was tested positive for the coronavirus.

The woman was undergoing treatment in First Neuro Hospital at Padil where a woman from Bantwal (identified as P-501), who died of coronavirus had undegone treatment before being shifted to Wenclock. 

With this, total number of positive cases in Dakshina Kannada district has gone up to 22.

Mangaluru/Udupi, Jun 24: Dakshina Kannada reported 12 new coronavirus positive cases where as neighbouring Udupi district reported 14 new cases today. Dakshina Kannada also reported a covid related death. 

Among the 12 cases in DK, 8 are males and 4 females. Four among them had recently come from Sharjah. One is suffering from severe acute respiratory infections (SARI) and seven with influenza like illness (ILI) symptoms.

In Udupi, there were two children among 14 people who tested positive today. There are 8 males and 6 females. Nine are Maharashtra returnees, one has travelled from Bengaluru, three have contracted infection from P-3851, and the source of infection of one more patient is being traced.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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