Religious tolerance exists in India; Hindu-Muslim problem created by politicians: Dalai Lama

Bengaluru, Apr 25: With 26 new COVID-19 cases confirmed in the past 24 hours, the total number of positive cases in Karnataka reached 500 on Saturday.

This includes 158 patients who have been cured and discharged following treatment while 18 deaths have been reported so far due to the infection in the State, according to a media bulletin issued by the Department of Health and Family Welfare on Saturday evening.

A total of 324 COVID-19 cases are currently active in the State as of Saturday evening 5 pm.
According to the bulletin, Bengaluru Urban with 133 positive cases, including 49 discharged and four deaths, is the worst-affected district in the State, followed by Mysuru and Belagavi, with 89 and 54 confirmed cases, respectively.

Mangaluru, Mar 29: The second day of a total clampdown by Dakshin Kannada district had no impact as panic-stricken people rushed to buy essential commodities in markets in the City on Sunday without caring for Social distance to be maintained.

Since the crowd swell within minutes the police were forced to order the shops forcibly as otherwise, it might have led to spread of dreaded killer Coronavirus COVID-19.

The rise in Covid-19 cases in Dakshina Kannada and the neighbouring Kasargod district had forced the district administration to declare on total bandh on Saturday and Sunday but in vain.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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