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Mangaluru, May 2:  Karnataka Pradesh Congress Committee Spokesperson P V Mohan on Saturday urged the district administration to find the source of coronavirus in Dakshina Kannada (DK) district.

He asked the district administration to ascertain from where a woman from Bantwal's Kasba contracted virus on April 19.

''We do not want to convert Dakshina Kannada into Nanjangud,'' Mr Mohan said referring to the mysterious case of Patient 52 from Nanjangud who has been identified as the main source of virus to the rest of the positive individuals in Nanjangud.

New Delhi, Feb 19: The UIDAI on Tuesday said its Hyderabad office has sent notices to 127 people for allegedly obtaining Aadhaar numbers on "false pretences" but asserted these have nothing to do with citizenship.

The notices were issued after reports from the police, the Unique Identification Authority of India (UIDAI) said.

"Aadhaar is not a document of citizenship and UIDAI has been mandated under the Aadhaar Act to ascertain residency of a person in India for 182 days prior to applying for Aadhaar," the nodal body, which issues the 12-digit biometric ID, said in a statement.

The Supreme Court, in its landmark decision, has directed the UIDAI not to issue Aadhaar to illegal immigrants, it said.

"It may be noted that the regional office Hyderabad received reports from the state police that 127 people have obtained Aadhaar on false pretences, as in their preliminary enquiry they were found illegal immigrants who were not qualified to obtain an Aadhaar number," the UIDAI said.

As per the Aadhaar Act, such Aadhaar numbers are liable to be cancelled.

"Therefore, the regional office Hyderabad has sent notices to them to appear in person and to substantiate their claims for getting an Aadhaar number," it said.

The UIDAI emphasised that these notices have "nothing to do with citizenship and cancellation of Aadhaar number is in no way related to the nationality of any resident".

In case it is found and proved that any of them obtained Aadhaar by submitting false documents or through false pretences, their Aadhaar is liable to be cancelled or suspended depending on the severity of the transgression, UIDAI said.

"Severe errors like forged documents, etc., will lead to appropriate actions, including suspending /cancelling the Aadhaar," it cautioned.

"Sometimes it becomes necessary to cancel the Aadhaar number when it is found that a resident has obtained it by submitting false biometrics or documents. It is a routine quality improvement process that the UIDAI takes up regularly," the authority said.

The 127 people have been asked to appear before the UIDAI deputy director in Hyderabad for a personal hearing on February 20.

Additional time has been given to allow them to collect the requisite documents, "Since it may take them some more time to collect the original documents that they had submitted for obtaining Aadhaar, as informed by the state police, the UIDAI has postponed the personal hearing to May 2020," it added.

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