Udupi: Rahul Gandhi breaks protocol to mingle with govt school children at Tenka Yermal

Bengaluru, Apr 28: There are a total of 523 COVID-19 positive cases have been confirmed in the state, Department of Health and Family Welfare of Karnataka informed on Tuesday.
It informed that there are 295 active COVID-19 cases in Karnataka presently, while 207 patients have been discharged, 20 deaths have been reported.

According to a district-wise breakup, a maximum of 131 cases were reported from Bengaluru urban, followed by Mysuru with 87 cases and Belagavi with 52 cases.

India's total number of coronavirus positive cases rises to 29,974 (including 22010 active cases, 7027 cured/discharged/migrated and 937 deaths), Ministry of Health and Family Welfare said on Tuesday.

Bengaluru, May 10: Karnataka on Sunday reported 59 new cases of coronavirus, taking the total number of cases in the state to 848, informed state health department.
Out of the total number of cases, 422 people have been discharged and 31 have died due to the infection in the state.
The health department further informed that six COVID-19 patients are currently in the Intensive Care Unit.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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