Separate lanes for VIPs, judges at toll plazas across India: Court orders NHA

London, May 20: The current physical distancing guidelines of 6 feet may be insufficient to prevent COVID-19 transmission, according to a study which says a mild cough in low wind speeds can propel saliva droplets by as much as 18 feet.

Researchers, including those from the University of Nicosia in Cyprus, said a good baseline for studying the airborne transmission of viruses, like the one behind the COVID-19 pandemic, is a deeper understanding of how particles travel through the air when people cough.

In the study, published in the journal Physics of Fluids, they said even with a slight breeze of about four kilometres per hour (kph), saliva travels 18 feet in 5 seconds.

"The droplet cloud will affect both adults and children of different heights," said study co-author Dimitris Drikakis from the University of Nicosia.

According to the scientists, shorter adults and children could be at higher risk if they are located within the trajectory of the saliva droplets.

They said saliva is a complex fluid, which travels suspended in a bulk of surrounding air released by a cough, adding that many factors affect how saliva droplets travel in the air.

These factors, the study noted, include the size and number of droplets, how they interact with one another and the surrounding air as they disperse and evaporate, how heat and mass are transferred, and the humidity and temperature of the surrounding air.

In the study, the scientists created a computer simulation to examine the state of every saliva droplet moving through the air in front of a coughing person.

The model considered the effects of humidity, dispersion force, interactions of molecules of saliva and air, and how the droplets change from liquid to vapour and evaporate, along with a grid representing the space in front of a coughing person.

Each grid, the scientists said, holds information about variables like pressure, fluid velocity, temperature, droplet mass, and droplet position.

The study analysed the fates of nearly 1,008 simulated saliva droplets, and solved as many as 3.7 million equations.

"The purpose of the mathematical modelling and simulation is to take into account all the real coupling or interaction mechanisms that may take place between the main bulk fluid flow and the saliva droplets, and between the saliva droplets themselves," explained Talib Dbouk, another co-author of the study.

However, the researchers added that further studies are needed to determine the effect of ground surface temperature on the behaviour of saliva in air.

They also believe that indoor environments, especially ones with air conditioning, may significantly affect the particle movement through air.

This work is important since it concerns safety distance guidelines, and advances the understanding of the transmission of airborne diseases, Drikakis said.

Aligarh, Feb 11: Paediatrician Dr Kafeel Khan, who was arrested from Mumbai on January 29 after he delivered a speech at Aligarh Muslim University (AMU) against communalism and politics of hate, will be released from jail on Tuesday after he was granted bail by an Aligarh court.

Khan will be released from Mathura jail on Tuesday after legal formalities are completed.

Chief judicial magistrate Karuna Singh granted bail to Khan on Monday on a bail bond of Rs 60,000. Two surety bonds of Rs 60,000 each would also be furnished by the guarantors.

Dr Khan's lawyer, Mohammad Irfan Gazi, told reporters, "The court was told that Khan was falsely implicated by police under political pressure. After hearing the arguments, the court granted him bail."

The suspended doctor was arrested by special task force (STF) of the UP police from Mumbai on January 29, when he reached the city to attend a protest against the Citizenship (Amendment) Act.

He was arrested in connection with a case registered against him in Aligarh under section 153-A (promoting enmity between different groups on ground of religion) of the Indian Penal Code at Civil Lines police station on December 13

The case was filed after his speech at Aligarh Muslim University (AMU).

According to the FIR, while addressing students, without naming anyone, Dr Kafeel Khan said that 'Mota Bhai' is teaching everyone to become Hindu or Muslim but not a human being. "This is a fight for our existence. We have to fight."

The FIR also said that Dr Kafeel Khan made an attempt to vitiate the peaceful atmosphere and disturb the communal harmony with his speech.

Dr Khan was in the news in 2017 when he was named as one of the nine accused in a case involving deaths of several children due to alleged disruption in supply of oxygen at the BRD Medical College in Gorakhpur. Though he was granted clean chit in a departmental inquiry, his suspension has not yet been revoked.

New Delhi, Apr 7: The death toll due to novel coronavirus rose to 114 and the number of cases in the country climbed to 4,421 on Tuesday, according to the Union Health Ministry.

While the number of active COVID-19 cases stood at 3,981, as many as 325 people were cured and discharged, and one had migrated, it stated. The total number of cases include 66 foreign nationals.

According to the ministry's data updated at 9 am, three new deaths were reported from Rajasthan, while Tripura recorded its first coronavirus case.

Maharashtra has reported the most coronavirus deaths at 45, followed by Gujarat at 12, Madhya Pradesh nine, Telangana and Delhi seven each, Punjab six and Tamil Nadu five fatalities.

Karnataka registered four deaths, while West Bengal, Uttar Pradesh, Andhra Pradesh and Rajasthan have recorded three fatalities each. Two deaths each have been reported from Jammu and Kashmir and Kerala. Bihar, Himachal Pradesh and Haryana have reported one fatality each, according to the health ministry data.

However, a PTI tally based on figures reported by states directly on Monday night showed at least 138 deaths across the country, while the confirmed cases reached 4,683. Of them, 359 have been cured and discharged.

There has been a lag in the Union Health Ministry figures, compared to the numbers announced by different states, which officials attribute to procedural delays in assigning the cases to individual states.

The highest number of confirmed cases are from Maharashtra at 748, followed by Tamil Nadu at 621 and Delhi with 523 cases. Kerala reported 327 COVID-19 cases, Telangana 321, Uttar Pradesh 305 and Rajasthan 288 cases. Andhra Pradesh reported 226 coronavirus cases.

Novel coronavirus cases have risen to 165 in Madhya Pradesh, 151 in Karnataka and 144 in Gujarat. Jammu and Kashmir has 109 cases, West Bengal has 91, Haryana 90 and Punjab 76 cases of the infection.

Thirty-two people were infected with the virus in Bihar while Uttarakhand has 31 patients and Assam 26. Odisha reported 21 coronavirus cases, Chandigarh 18, Ladakh 14 and Himachal Pradesh 13 cases.

Ten cases each have been reported from the Andaman and Nicobar Islands and Chhattisgarh. Goa has reported seven COVID-19 infections, followed by Puducherry with five cases. Jharkhand has reported four cases and Manipur two. Tripura, Mizoram and Arunachal Pradesh have reported one case of the infection each.

"State-wise distribution is subject to further verification and reconciliation," the ministry said on its website.