Nagma Mohamed Mallick is new Indian Ambassador to Tunisia

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, May 20: Karnataka Government has banned fishing through mechanised and traditional boats using inboard or outboard engines of over 10 HP capacity using nets or other means, officials sources said on Wednesday.

As per the notification issued under the Karnataka Marine Fishing (Regulation) Act 1986, all fishing activities were banned from June One to July 31.

However, the ban is not applicable for fishing through traditional and country boats which use engines of less than 10 HP capacity, according to a release issued here on Wednesday.

Belagavi, Feb 22: A madrasa in Karnataka’s Belagavi district hosted a Hindu-Muslim mass marriage on its premises on Friday, sending a strong message of communal amity. As many as 76 Muslim couples and 25 Hindu couples entered marital life on the occasion.

Madarsa Al Arabia Anwarul Ulooma, an Islamic religious institute in Bailhongal, 50km from Belagavi district headquarters, played host to the event that was organised by Jamia Faizan-ul-Quran and Issa Foundation, which has conducted mass marriages on a bigger scale in Gujarat.

The mass marriage comes a month after the 100-year-old Cheravally Jamaat Masjid in Kerala’s Kayamkulam in Alappuzha hosted a Hindu wedding, complete with a vegetarian feast for 4,000 people. A Hindu priest led the rituals, and the couple sought the blessings of chief imam Riyasudeen Faizy of the mosque.

At Bailhongal, moulvis and pontiffs led the marriage proceedings and asked the couples to read passages from Quran and Bhagvad Gita.

The Hindu couples were gifted a copy of the Gita, and newly-married Muslim couples received a copy of Quran. The organisers provided each Hindu bride a mangalsutra. Bailhongal MLA Mahantesh Koujalagi blessed the couples at the event, which was attended by more than 4,000 people.

Mohammad Rafique A Naik, a member of Jamia Faizan-ul-Quran, said they have gifted each couple a refrigerator, an almirah and a tailoring machine. Ranjita Kalala, a bride who married a daily-wage labourer, said her family couldn’t afford the cost of a wedding, adding, “When we learnt about the Bailhongal madrassa’s plan, we agreed to sign up because it also sends out a message of communal harmony.”