Muslims have all the right to demand Cong LS ticket from DK; I am with them: Poojary

Bengaluru, April 3: Thirteen people in Karnataka, who had attended the Tablighi Jamaat event in Delhi, have tested positive for coronavirus, said state education minister S Suresh Kumar.

"13 attendees of Delhi's Tablighi Jamaat event have tested COVID-19 positive and 187 were tested negative," said Kumar, who has been entrusted to look into queries related to COVID-19.

He added, "A total number of four COVID-19 positive cases have been confirmed today -- a 75-year-old man in Bagalkote, a 70-year-old in Belagavi, a 26-year-old in Belagavi and a 20-year-old in Belagavi."

"The three people from Belagavi had attended the Tablighi Jamaat event in Delhi," he said, adding that the total number of cases in the state increased to 128.

The reports of 88 other people who had attended the Tablighi Jamaat event are yet to be received, the minister said.

The total number of COVID-19 positive cases in India on Friday rose to 2,547 including 162 cured/discharged and 62 deaths, according to the Ministry of Health and Family Welfare.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Udupi, Mar 25: A 34-year-old man who returned from Dubai tested positive for novel coronavirus in Udupi district. This is the first case in the district. 

He returned from Dubai on March 18 and got admitted to a government hospital in Udupi on March 23 for fever. The swab samples were sent to Shivamogga laboratory for testing.

The report which arrived on Wednesday confirmed that he was positive for COVID-19, said DHO Dr Sudhir Chandra Sooda.