Coronavirus can go up to 8 metres from exhalation, linger in air for hours: MIT scientist

News Network
April 2, 2020

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
May 12,2024

TVserial.jpg

In an intriguing turn of events, authorities have levied a fine against an actress for breaching traffic regulations depicted within a television serial.

In the 14th episode of the popular serial ‘Seetha Raama’ a Kannada language drama series airing on Zee Kannada, a scene featuring two individuals riding a scooter caught the attention of viewers. While the rider adhered to safety protocols by wearing a helmet, the actress on the pillion did not.

Jayaprakash Yekkur, a vigilant resident of Mangaluru, took swift notice of this discrepancy and promptly lodged a complaint with the Mangaluru City Police Commissioner. Yekkur underscored the concern that such portrayals of traffic violations by actors and actresses could potentially convey misleading messages to viewers, particularly those who are impressionable. He urged authorities to take decisive legal action against the actress, the serial’s director, and the broadcasting channel.

In response to Yekkur’s complaint, the Commissioner of Police forwarded the matter to the Mangaluru Traffic Police station. Subsequently, notices were issued to the owner of the two-wheeler featured in the scene and the serial’s director. Upon investigation, it was revealed that the scene had been filmed in Nandini Layout, Bengaluru, and was referred to the Rajajinagar police station for further scrutiny.

On May 10, after thorough inquiries, the Rajajinagar police station imposed a fine of Rs 500 on both the actress and the owner of the two-wheeler. Furthermore, the production manager of the serial committed to adhering strictly to traffic regulations in future episodes.

Expressing his contentment with the resolution, Jayaprakash Yekkur commented that the prompt response from the police, coupled with the imposition of a fine, serves as a valuable lesson and contributes significantly to enhancing public awareness.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
May 6,2024

Bengaluru, May 6: Arrested JD-S MLA H.D. Revanna, the son of former PM H.D. Deve Gowda, on Sunday said that there is no evidence against him in the sex video scandal kidnapping case and that it was a "conspiracy" against him.

Talking to the media, while being taken for a medical test before being produced in front of a court here, Revanna stated that a kidnapping case had been lodged against him though he does not have 'one black mark' against him in his entire career of 40 years.

"Without evidence, I have been targeted... All allegations against me are false. My arrest has been made out of ill intention," he claimed.

"The case was lodged on April 28, then, they did not have any evidence. Later, the fake evidence was created on May 2 and I was fixed," he alleged.

Home Minister Dr G. Parameshwara stated on Sunday that a Blue Corner notice has already been issued against Revanna's son and MP Prajwal Revanna, the prime accused in the sex video scandal, as he is believed to be abroad.

"The Interpol will communicate to all nations and he will be located. Once he is located, the SIT will take a call on how he should be secured and brought back to India," he added.

Revanna was arrested on Saturday on charges of kidnapping one of the victims of the sex video scandal.

Parameshwara further maintained that the arrest of Revanna has saddened JD-S leaders and if action was not taken, the SIT would be blamed too.

Meanwhile, Congress President Mallikarjun Kharge refused to comment on the alleged sex video scandal involving Prajwal Revanna.

About Revanna's arrest, he said that the SIT would initiate action as per the law. "Those indulging in such acts must be taught a lesson and justice should be given to the families of victims. No one can escape the law. No one should use this case politically," he stated.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
May 11,2024

prakashhindu.jpg

Madikeri, May 11: Kodagu police have apprehended the man allegedly responsible for the brutal murder of a minor girl within the confines of Kumbaragadige village in Karnataka's Somwarpet taluk. 

Kodagu Superintendent of Police, K Ramarajan, disclosed that the arrested individual is Prakash (32) from Hammiyala village in Somwarpet taluk. However, authorities are still in the process of recovering the severed head of the victim. The perpetrator had absconded with the victim's severed head after committing the crime. 

Search operations for the suspect commenced late on Thursday night (May 9), with officials diligently pursuing leads. Acting on information suggesting the suspect's presence in a forested area near the village, the police swiftly moved in and apprehended him.

The victim US Meena, 15, a student of Surlabbi High School, had passed the SSLC examinations, the results of which were announced on May. One same day, she was murdered. 

Reportedly, the engagement of the minor girl with the suspect was thwarted by officials from the Women and Child Development department. Subsequently, officials persuaded the girl's parents against proceeding with the marriage. 

However, despite these interventions, the suspect forcibly entered her residence during the night, purportedly abducted her, and later perpetrated the heinous crime in a wooded area on the outskirts of the forest, before absconding with her severed head.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.