'Kundapur accident that claimed lives of 8 students could have been avoided'

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, May 24:The first 'Sunday curfew' imposed by the Karnataka government to try and contain the spread of COVID-19 got underway in the state today, with people by and large adhering to norms, roads wearing a deserted look and almost no vehicular traffic, barring essential services.

With barricades being up across most roads in the state, people ventured out only to purchase groceries, vegetabes and medicines.

Instances of violation of Sunday curfew lockdown norms were reported in COVID-19 hotspots of Shivajinagar and Rayapura in Bengaluru and Nelamangala and Devanahalli.

Temples, malls, bars, eateries and small food joints remained shut throughout state.

In most parts of the state buses, autorickshaws and cabs did not ply.

In Bengaluru, the ever bustling Majestic area, which houses the central city bus stand, inter-city bus stand, Metro Railway Station and the City Railway Station, did not see any activity as buses did not ply and all shops were shut, police said.

Reports from Mysuru, Tumakuru, Kolar, Mangaluru, Udupi and other towns across the state said there were no lockdown violations.

Amid the rigid curfew marriages were conducted in a simple manner in various parts of the state like Gollarahatti and Yashwanthapura in Bengaluru and also in Davangere.

Families of the brides and grooms invited only a few people for the event, adhered to social distancing norms and wore masks.

In Gollarahatti, the event organisers cleaned the road, after which the invitees, who were hardly 25 to 30 in number, sat down to have a feast.

The Karnataka government had eased restrictions during Lockdown 4 for start of economic activities like city buses, inter-district bus service, intrastate train services, opening of shops and markets.

However, the government had made it clear that there will be 'Janata Curfew' every Sunday during which only essential services would be permitted.

Bengaluru, Jan 12: Protesters plan to intensify their anti-Citizenship (Amendment) Act movement from sit-down satyagrahas and rallies to street and door-to-door campaigns in different parts of the city.

The street campaigns began on January 1 with 20-30 volunteers of Hum Bharat Ke Log, reaching out to people in Koramangala and Whitefield and explaining the CAA, National Population Register (NPR), National Register of Citizens (NRC) and related issues. They have organised four campaigns.

According to Zia Nomani, member of Hum Bharat Ke Log, the campaign will intensify soon. “Over 200-400 volunteers will organise nukkad sabhas and other activities around JP Nagar and Banashankari,” Nomani said.

She added that though protests began as a medium for people to vent their concerns, more needs to be done.

“We have realised that many people have begun working on their personal documents and want to help them understand what CAA is all about,” Nomani said.

Volunteers will talk to people at street junctions, discuss issues and run signature campaigns. They say: “Our movement is focussed on reaching out to people. Pro-CAA workers too started a door-to-door campaign last week.”

Avani Chokshi, an advocate who participated in a campaign, said though people had a cursory idea about these issues, they didn’t know the details. “It through such campaigns that we can reach more people. It’s important to talk to people who haven’t made up their mind about the issues or are even pro-CAA,” said Avani, adding, “It hard to combat hatred in a short span of time. The movement needs to be sustained.”

Activist Geeta Menon, who has been at the forefront of the street campaign, says they were heckled at some places.