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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jul 11: The Bharatiya Janata Party led government of Karnataka is planning to ban cow slaughter as well as the sale and consumption of beef in the state by bringing Prevention of Cow Slaughter and Preservation Bill, 2012.

"Many states have passed the Anti-Cow Slaughter Bill. We are preparing to implement it in Karnataka as well. The state government will soon implement a ban on cow slaughter, sale and consumption of beef on the lines of many other states," said Prabhu Chauhan, the state's Animal Husbandry Minister.

The Anti-Cow Slaughter Act is already in place in several states like Gujarat, Delhi, Haryana, Maharashtra, Madhya Pradesh among others.

Last month, the Yogi Adityanath-led Uttar Pradesh government passed a draft ordinance to prevent cow slaughter, providing maximum rigorous imprisonment of 10 years and a fine up to Rs 5 lakh.
The Uttar Pradesh Cabinet Cow Slaughter Prevention (Amendment) Ordinance, 2020 aims at making the existing Uttar Pradesh Prevention of Cow Slaughter Act, 1955 more effective towards cow safety.

In Karnataka, the BJP-led government had promised to ban cow slaughter in its manifesto for 2018 state assembly election.

"The government will form a team of experts to look into once the current pandemic situation eases," Chauhan stated, adding that if necessary, the team of experts will visit states like Uttar Pradesh, Gujarat.

The then BS Yediyurappa-led BJP government had passed the Karnataka Prevention of Cow Slaughter and Protection Bill in 2010 but it failed to get presidential approval. Three years later, the Bill was withdrawn by the Siddaramaiah-led Congress government.

"I will discuss this matter with Chief Minister and if this pandemic situation eases, by next session, if not by upcoming assembly session, we will try to bring Karnataka Prevention of Slaughter and Preservation of Cattle Bill," Chauhan added.

Bengaluru, Jan 14: The Karnataka High Court on Tuesday issued a notice to the government of Karnataka while hearing the plea for ordering Judicial probe into the December 19, violence and police action in Mangaluru.

On December 19, the local police while taking action against anti-CAA and NRC protesters had fired at them which had killed two citizens. The police action was then followed by curfew in the region for over 48 hours.

The High Court bench hearing the plea of JD(s) leader Iqbal and Sullia Pattan Panchayat member Iqbal seeking its intervention to order judicial probe into the matter has issued the notice to the government.