Mangaluru surfer Tanvi to represent India at Fiji world championship

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Kalaburagi, Feb 27: Kalaburagi police has issued notice to AIMIM leader Waris Pathan to appear before the investigation officer to give his statement in connection to the controversial statement that he recently made during an anti-CAA rally.

"We have already served notice to appear and the date is 29th. He is supposed to give his statement. Some people have already recorded their statements," said Kalaburagi Police Commissioner MM Nagaraj.

Recently while addressing an anti-CAA rally in Kalaburagi, the AIMIM leader had said: "Time has now come for us to unite and achieve freedom. Remember we are 15 crores but can dominate over 100 crores."

Bengaluru, Jul 4: With the increasing number of COVID-19 cases in Bengaluru, the state government has decided to impose a total lockdown in Bruhat Bengaluru Mahanagara Palike (BBMP) limits.

The lockdown will start from 8 pm today till 5 am on Monday. The sale of essential items will only be allowed during the total lockdown.

"Complete lockdown to be imposed from 8 pm today till 5 am on Monday in Bruhat Bengaluru Mahanagara Palike (BBMP) limits, as per instructions by Karnataka Chief Minister BS Yediyurappa in view of COVID-19," BBMP Commissioner Anil Kumar said on Saturday.

"Sale of essential items will be allowed during the lockdown, including meat shops. Police action will be taken against people found roaming outside unnecessarily," he said.

With the number of cases increasing by 994 in the last 24 hours, the total of cases in the city now stands at 7,713. Of these, 6,297 are active cases.

So far, Karnataka has 19,710 cases with 293 deaths. While 8,805 people have recovered from the deadly virus.

At the national level, the total number of cases have now surged to 6, 48,315 out of which 3, 94,227 patients have recorded, while 18,655 have lost their lives.