Mohammed Shafi Armar from Bhatkal killed in US airstrike in Syria

Mangaluru, July 17: For the first time, Dakshina Kannada saw over 3,00 new coronavirus cases in a single day. The coastal district today recorded 311 positive cases. 

The number of active cases in the district is 1,725 while its overall tally stands at 3,074.

Out of the 26,242 samples tested so far, 23,168 were tested negative. 

As many as 1,278 people were discharged after fully recovering so far including 115 people who were discharged today.

The district also recorded deaths of 8 covid-19 patients in past 24 hours including a woman. The deceased are aged between 53 years and 78 years. 

With this the total number of deaths in the district mounted to 71 including 12 patients from other districts who were admitted in hospitals here. 

Meanwhile, Karnataka reported 3,693 fresh cases in the last 24 hours, which raised the virus case count to 55,115. The number of recoveries reached 20,757, including 1,028 on Friday.

At 115 fatalities, the state witnessed its biggest single-day jump. Bengaluru accounted for 75 of these 115 deaths. The number of active cases in the state are 33,205, including 508 patients who are in ICU. The state's death toll reached 1,147 while that of Bengaluru stands at 582.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 12: Swift and strict action by the District Administration has resulted in the district achieving ‘Clean’ week with no new cases of COVID-19 reported for the seventh day in a row.

Meanwhile, in a happy coincidence, the district’s only infant allegedly affected – a ten month old child – was totally cured and discharged from the hospital along with infant’s mother and grandmother who were considered to the primary contacts. They are never tested positive for the virus, it is reported. Health experts attributed this to their natural immunity.

The child is said to have contracted the infection during a family visit to Kasargod, which has turned in to a Covid-19 hot spot. The family which hails from Sajipanadu in Bantwal-taluk had been kept in isolation ever since the child had tested positive on March 25. The quarantine was extended to the entire village as a preventive measure and the District Administration undertook the responsibility to providing essential supplies.