Yeddyurappa will be Karnataka CM for next five years: Sadananda Gowda

Bengaluru, Jul 15: Karnataka on Wednesday reported 3,176 new cases taking the total count of cases in the state to 47,253.

A total of 1,975 new cases were reported from the Bengaluru alone, the state's health department said.

The toll has gone up to 928 with 87 deaths reported today.

The total count of COVID-19 cases in the country is 9,36,181.

Thiruvananthapuram, Mar 29: Twenty more people were

detected with coronavirus in Kerala on Saturday, taking the total number of those undergoing treatment for the deadly infection to 181, Health Minister K K Shailaja said.

While Kannur reported eight cases, Kasaragod 7, Thiruvananthapuram, Ernkulam, Thrissur, Palakad and Malappuram reported one case each, Shailaja said in a statement here.

Of the 20 people, 18 had come from abroad and two others had been infected through contact.

The man found positive here was in the isolation ICU of the Thiruvananthapuram Medical College hospital, while one positive case from Ernakulam was a health worker.

The samples of four persons who were under treatment at Pathnamthitta were found negative.

At least, 1,41,211 people are under observation across the state, the Minister addd.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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