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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

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News Network
May 7,2024

rafah.jpg

Israeli military aircraft have heavily bombed the city of Rafah in the southern Gaza Strip accompanied with ground advances shortly after the Palestinian resistance movement Hamas said it had agreed to a proposal on ceasefire in Gaza.

A Palestinian journalist reported flares in the night sky, while locals said dozens of reconnaissance drones flew overhead.

The official Palestinian news agency Wafa and Egyptian media said Israeli military vehicles advanced towards the Palestinian side of the Rafah crossing with Egypt, as well as the Karem Shalom crossing with the Israeli-occupied territories.

A Palestinian security official and an Egyptian authority have told the Associated Press news agency that Israeli tanks have entered Rafah, reaching as close as 200 meters from Rafah’s border crossing with neighboring Egypt.

The Israeli military has said it was conducting “targeted strikes” against Hamas in eastern Rafah.

Israeli prime minister Benjamin Netanyahu's office has also said "Israel is continuing the operation in Rafah to exert military pressure on Hamas" in order to advance the release of captives and what it called "the other objectives of the war."

In the meantime, it described the proposal on ceasefire as "far from Israel's essential demands," but added that it would send negotiators for talks "to exhaust the potential for arriving at an agreement."

The military strikes on Rafah came ahead of talks in Egypt on Tuesday aimed at sealing a truce proposal accepted by Hamas, which was put forward by Qatari and Egyptian mediators. 

According to a copy of the proposal, there will be three phases to ending Israel’s onslaught against Gaza.

The first phase calls for a complete withdrawal of Israeli troops from the Netzarim corridor and the return of displaced Palestinians to their homes. The second phase involves an announcement of a permanent cessation of military operations. In the last phase, there would be a complete end to the blockade of the Gaza Strip. 

In return, Israel would be required to release an unspecified number of Palestinian prisoners, withdraw its troops from certain regions of the Gaza Strip, and allow Palestinians to travel from the south of the coastal sliver to the north.

About 1.5 million Palestinians are sheltering in Rafah, once designated a “safe zone” by the Israeli military. Palestinians are now struggling to evacuate the city, after the Israeli military dropped leaflets ordering them to leave as a large-scale assault on the city is planned.

UN Secretary General Antonio Guterres has said that a ground invasion of Rafah would be “intolerable” and called on Israel and Hamas “to go an extra mile” to reach a truce deal.

“This is an opportunity that cannot be missed, and a ground invasion in Rafah would be intolerable because of its devastating humanitarian consequences, and because of its destabilizing impact in the region,” Guterres told reporters on Monday ahead of a meeting with Italian President Sergio Mattarella in New York.

Jordanian Foreign Minister Ayman Safadi has also warned that Israel is “jeopardizing the deal by bombing Rafah.”

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News Network
May 3,2024

Bengaluru: In a shocking revelation, a former member of Hassan Zilla Panchayat (ZP) has accused incumbent JD(S) MP Prajwal Revanna of raping her multiple times over three years and videographing the alleged crime.

A case was registered by the Criminal Investigation Department (CID) based on the statement by the 44-year-old survivor on Wednesday, May 1.

According to the First Information Report (FIR), the woman claimed that when she was a ZP member she used to visit the MLAs and MPs for various development works.

In one such instance in 2021, she met Prajwal seeking his help to get hostel seats for some female students at a local college. The woman, in her statement, said that since the MP was busy, she was asked to meet him the next day.

“The following day I visited the MP at his office and the MP's quarters in Hassan. The staff present there told me to wait on the first floor as there were many others in the hall. Prajwal spoke to some of the women waiting there, spoke with them and sent them off until I was the only one left,” the woman alleged.

As per the survivor, the MP then called her inside a room and she obliged.

“He held my hand, pulled me inside and locked the door. When I asked him why was he closing the door, he told me nothing would happen and made me sit on the bed. He said my husband should talk less and warned me of the consequences. He also said that because of my husband, his mother, Bhavani Revanna, missed the MLA ticket. He told me that if my husband wants to grow politically, I should listen to him [Prajwal],” the woman alleged.

Next, Prajwal allegedly told the woman to lie down on the bed and undress. When the woman refused and said that she would shout, Prajwal allegedly threatened her that he had a gun and warned of dire consequences for her and her husband.

The woman alleged that Prajwal took out his mobile phone and then raped her.

“He raped me and sexually assaulted me and recorded the act on his mobile phone,” the woman alleged. “He threatened to leak the video if I ever spoke about it and told me to be there whenever he wanted. After that, he used to video call me frequently, ask me to be naked during the call and raped me in multiple instances.”

The woman claimed that she was scared and did not make the incident public and chose to come forward after she learnt of the Special Investigation Team (SIT) set up by the Karnataka government to probe the alleged Hassan sex scandal.

A case was registered under Sections 376(2)(n) (commits rape repeatedly on the same woman), 506 (criminal intimidation), 354A(1)(physical contact and advances involving unwelcome and explicit sexual overtures), 354B (assault or use of criminal force to woman with intent to disrobe) and 354C (voyeurism) of the Indian Penal Code (IPC) and 66E (violation of privacy) of the Information Technology (IT) Act.

Prajwal is also accused in a sexual harassment case along with his father, Holenarasipur MLA HD Revanna, registered at the Holenarasipur police station in Hassan on April 28. 

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News Network
May 2,2024

Bengaluru, May 2: Prajwal Revanna, grandson of former Prime Minister Deve Gowda, was issued fresh summons on Thursday by the Special Investigation Team (SIT) which is investigating the case of obscene videos involving the former JD(S) member, several news outlets reported.

The SIT also junked his appeal which sought seven days time to join the probe, as per these reports.

Prajwal and his father, H D Revanna, have sexual harassment and stalking cases filed against them over the matter. Gowda's son, H D Revanna, however, said that what took place '4-5 years ago' is now being turned into a legal case.

JD(S) in its core committee meeting suspended Prajwal from the party till the end of the probe. Prajwal, meanwhile, took to X to state he would join the probe in seven days time, asserting 'truth will prevail'.

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