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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Apr 16: In view of the raging coronavirus pandemic, no public iftaar or sehri will be organized during Ramazan, the month of fasting for the Muslims, the Karnataka Minority Welfare Department announced here on Thursday.

"No public shall be allowed to perform five-time congregational prayers in mosques, across Karnataka during Ramazan in view of COVID-19 pandemic. No public address system to be used by the staff of mosques for offering namaz,'' the department said.

During the holy month of Ramazan, it is a tradition to organise iftaar feasts for large gatherings by different people, especially by politicians, celebrities and the common wealthy people for their friends and family.

Ramazan is to commence from the 24th or 25th of April this year, depending on the sighting of the moon.

The order stated that Azaan (the call for prayer) shall be given at low decibel and namaaz including Friday namaaz, will be performed by the imams, moazzins and the masjid staff only.
No public should be allowed to offer namaaz in the mosques as per government directions, it said.

The state government also cited an order by the Ministry of Home Affairs dated April 15, which stated that "All religious places/places of worship shall be closed for public. Religious congregations are strictly prohibited due to the outbreak of COVID-19 across the country."
Thirty-four more COVID-19 cases, including 17 cases from Belagavi, have been reported from Karnataka. The total number of coronavirus cases in the state now stands at 313.

The total number of cases in India has now climbed to 12,380. Out of these cases, 1489 have been cured/discharged/migrated while 414 deaths have been reported so far, as per the latest data provided by the Ministry of Health and Family Welfare.

Mangaluru, Jan 17: A poultry truck transporting chickens overturned on Friday at Perne village near Uppinangady on Mangaluru-Bengaluru National Highway, killing 200 of them.

Police said that the truck was headed towards Mangaluru from Uppinangady when the truck driver lost control of the vehicle causing it to topple. As many as 200 chickens were killed in the mishap.

Another vehicle was later used to transport the remaining chickens.