Karnataka's free LPG scheme for BPL families by July 10

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

New Delhi, Feb 12: Cooking gas LPG price on Wednesday was hiked by a steep Rs 144.5 per cylinder due to spurt in benchmark global rates of the fuel.

But to insulate domestic users, the government almost doubled the subsidy it provides on the fuel to keep per cylinder outgo almost unchanged.

LPG price was increased to Rs 858.50 per 14.2 kg cylinder from Rs 714 previously, according to a price notification of state-owned oil firms.

This is the steepest hike in rates since January 2014 when prices had gone up by Rs 220 per cylinder to Rs 1,241.

Domestic LPG users, who are entitled to buy 12 bottles of 14.2-kg each at subsidised rates in a year, will get more subsidy.

The government subsidy payout to domestic users has been increased from Rs 153.86 per cylinder to Rs 291.48, industry officials said.

For Pradhan Mantri Ujjwala Yojana (PMUY) beneficiaries, the subsidy has increased from Rs 174.86 to Rs 312.48 per cylinder.

After accounting for the subsidy that is paid directly into the bank accounts of LPG users, a 14.2-kg cylinder would cost Rs 567.02 for domestic users and Rs 546.02 for PMUY users.

The government gave out 8 crore free LPG connections to poor women under PMUY to increase coverage of environment-friendly fuel in kitchens.

Normally, LPG rates are revised on 1st of every month but this time it took almost two weeks for the revision to take place - a phenomenon which industry officials said was due to approvals needed for such a big jump in subsidy outgo.

Others said the decision to defer the increase could have been because of assembly elections in Delhi. Delhi voted on February 8.