Mangaluru: Basheer who was attacked by hatemongers loses battle for life

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.

Mangaluru, July 24: Karnataka's Dakshina Kannada district reported 8 new Covid-19 deaths in the last two days taking the toll to over 100. The district has recorded 107 Covid-19 deaths till now.

Deputy Commissioner Sindhu B Rupesh on Friday said a 44-year-old man from Mangaluru with the symptoms of respiratory failure, ARDS, AKI MODS hypertension, was admitted to a private hospital on July 19 and died on July 22. His throat swab tested positive for Covid-19 on Friday.

Another 56-year-old man from Mangaluru, who died on July 23, was suffering from urinary tract infection, MODS-septic shock, type II diabetes mellitus, hypothyroidism, systematic hypertension and IHD and had tested positive for Covid-19.

Mangaluru saw two more deaths -- a 75-year-old woman suffering from COPD with type 2 respiratory failure and multi-organ dysfunction syndrome with septic shock and a 65-year-old woman, who was suffering from BP and diabetes and admitted to a private hospital on July 13 and died on July 23.

A 61-year-old woman from Puttur, who was suffering from diabetes mellitus and hypertension and was undergoing treatment at a private hospital, died on July 23.

A 67-year-old man from Bhadravathi in Shivamogga, who was admitted to Wenlock Hospital on July 13 and was suffering from pneumonia and respiratory infection, died on July 23. He too tested positive for Covid-19.

Some of the other deaths were those of -- a 42-year-old man from Bantwal suffering from type 1 respiratory failure, urosepsis and uncontrolled type 2 diabetes and a 67-year-old man from Bhadravathi suffering from acute myocardial infarction, uncontrolled type 2 diabetes and systematic hypertension, Both died at private hospitals on July 23.

180 fresh cases

The Covid-19 graph slightly moved downward with the recording of 180 fresh cases, including four police personnel from Puttur police station. Of the positive cases, 56 are the primary contacts of the infected persons, 68 are suffering from Influenza-Like Illness (ILI) and 10 with the symptoms of Severe Acute Respiratory Infection (SARI).

The contacts of 45 persons who tested positive are being traced. One person with international travel history has also tested positive.

A total of 125 persons recovered and were discharged from hospitals, thus taking the tally of the total discharges to 1987.

Bengaluru, Apr 30: The Karnataka government on Thursday decided to allow migrant workers, tourists, students and others stranded in different parts of the state due to the ongoing lockdown to return to their native places, a day after the Centre issued guidelines for the process.

This will be a one-time movement and the government would arrange buses for those in need but they should bear the expenses, Law and Parliamentary Affairs Minister J C Madhuswamy said. He also said people willing to return to the state would have to undergo tests for COVID-19. The decision was taken at the state cabinet meet and it might come into effect from Friday as the Chief Secretary will have to issue an official order, he said.

"Prime Minister Narendra Modi had taken decision on movement of people and the Centre had issued a circular in this regard. Following this we have decided to permit interstate and inter-district movement," he told reporters here.

Travel expenses should be borne by those willing to return and if they want the government can provide buses from the state transport corporations. The Union Ministry of Home Affairs on Wednesday issued orders allowing migrant workers, tourists, students and other people stranded in different parts of the country to move to their respective destinations with certain conditions, giving a big relief to the distressed people. Decision on opening of salons and liquor shops will be taken after May 3, he said.

Madhuswamy said permission would be given for one-time movement of labourers and others who want to go from one district to other for work or any other purpose. Those operating industry or establishment and want to move from place to place for management purpose will be given passes with strict scrutiny and through checks.

Responding to a question, the minister said, "we don't know yet how many are willing to go, where they will go, if some one asks for permission, we will permit." "One family or two or three people want to go, they can use taxi. If too many people want to go, we will provide facility through transport corporation buses," he said.