'Parents post their kids’ photos online despite knowing it may cause harms'

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 25: Karnataka Chief Minister B S Yediyurappa on Monday greeted the Muslim brethren on the occasion of Eid-ul-Fitr, which is being celebrated in a subdued manner due to coronavirus related restrictions.

"Warm greetings of Eid-ul-Fitr. May this festival of peace and harmony bring happiness in life," Yediyurappa said in his message.

He congratulated the Muslim fraternity for cooperating with the authorities by offering prayers at home during the holy month of Ramadan and supporting the government to contain COVID-19.

"I hope the same trend will continue during the festivities of Eid-ul-Fitr too. I thank you all for your support in the fight against COVID-19," he said.

The Eid festivities were a low-key affair as Muslim brethren celebrated the festival indoors in view of lockdown to contain coronavirus on Monday.

People offered the special prayers inside their houses instead of performing it in mosques and Eidgah, the open field to perform prayers, and refrained from going out to greet each other.

As the Karnataka government has ordered Sunday Curfew throughout the lockdown-4 till May 31, the otherwise bustling markets in the urban areas of Karnataka remained shut.

People could not venture out to make necessary purchases on Sunday.

The Jama Masjid of Bengaluru at the City Market had asked the Muslims to offer prayers inside their houses and not go to the burial grounds to express their sentiments for the departed souls.

"Mass prayers are not allowed anywhere in Karnataka. Just five important persons managing the mosques offered the prayers. Similarly, people go to the graveyard to pray for the dead ones but this time we asked people to express their sentiments from inside their homes instead of going to the burial grounds," Maulana Maqsood Imran, the Khateeb-O-Imam, Jama Masjid, Bengaluru, told news agency.

He said, "coronavirus is spreading very rapidly in our country. If we don't follow the guidelines, it will not only cause trouble to us but also to the doctors and the government. It will be the biggest celebration if we abide by the norms."