Modi renames 3 islands of Andaman and Nicobar

New Delhi, Jun 6: With 9,887 new positive cases reported in the last 24 hours, India's COVID-19 count touched 2,36,657 on Saturday surpassing Italy's latest tally of over 2.34 lakh, taking India to the sixth spot among countries with the highest caseloads of the virus.

The Union Ministry of Health and Family Welfare (MoHFW) said that India registered a spike of 9887 new cases and 294 deaths in the past 24 hours taking the tally to 1,15,942 active cases and 6642 deaths.

Today's count was the highest single-day spike in the country, which has now overtaken Italy, according to the tally posted by the Johns Hopkins University which posted that globally the coronavirus had infected over 66.64 lakh people and claimed over 3.91 lakh lives so far.

In india, the MoHFW informed that 1,14,073 persons have been cured/discharged/migrated so far.

Maharashtra remains the worst-hit State as the total number of COVID-19 positive cases reached 80,229. While the total number of active cases in the state stands at 42,224.

In Tamil Nadu, 28,694 cases have been detected so far while Delhi has reported 26,334 coronavirus cases.

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.

New Delhi, May 10: India's COVID-19 count crossed 60 thousand on Sunday, with Maharashtra being the worst-affected due to the infection so far, according to the Union Ministry of Health and Family Welfare.

The number of total confirmed cases in the country rose to 62,939, including 19,358 patients who have been cured and discharged or migrated, according to the Ministry.

The total number of active cases in the country, therefore, stands at 41,472.

The number of deaths in the country due to the infection reached 2,109 on Sunday.

While Maharashtra, with 20,228 cases is the worst-affected state, it is followed by Gujarat with 7,796 and the national capital, Delhi, with 6,542 cases. Tamil Nadu, is marginally behind Delhi with 6,535 cases.