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In the study, published in the journal Physics of Fluids, researchers used a model to understand airborne transmission that is designed to be accessible to a wide range of people. Unsplash

The continued increase in COVID-19 infections around the world has led scientists to study the dynamics of airborne transmission.

In the study, published in the journal Physics of Fluids, researchers, including one of Indian-origin, used a model to understand airborne transmission that is designed to be accessible to a wide range of people.


Employing basic concepts of fluid dynamics and the known factors in airborne transmission of diseases, the researchers proposed the Contagion Airborne Transmission (CAT) inequality, model.

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While not all factors in the CAT inequality model may be known, it can still be used to assess relative risks, since the situational risk is proportional to the exposure time.

Using the model, the researchers determined protection from transmission increases with physical distancing in an approximately linear proportion.

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“If you double your distance, you generally double your protection. This kind of scaling or rule can help inform policy,” said study author Rajat Mittal from the Johns Hopkins University in the US.


The researchers hope to look more closely at face mask efficiency and the transmission details in high-density outdoor spaces. Unsplash

The scientists also found even simple cloth masks provide significant protection and could reduce the spread of Covid-19.

“We also show that any physical activity that increases the breathing rate and volume of people will increase the risk of transmission,” said Mittal.

These findings have important implications for the reopening of schools, gyms, or malls.

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The CAT inequality model is inspired by the Drake equation in astrobiology and develops a similar factorization based on the idea that airborne transmission occurs if a susceptible person inhales a viral dose that exceeds the minimum infectious dose.

The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy.

Want to read more in Hindi? Checkout: पुतिन ने नाटो से यूरोप में तनाव कम करने के लिए कहा

The model includes variables that can be added at each of the three stages of airborne transmission: the generation, expulsion, and aerosolization of the virus-containing droplets from the mouth and nose of an infected host, the dispersion and transport via ambient air currents; and the inhalation of droplets or aerosols and the deposition of the virus in the respiratory mucosa in a susceptible person.

The researchers hope to look more closely at face mask efficiency and the transmission details in high-density outdoor spaces.

Also Read: Technology to Produce Psychoactive Drugs by IIT Guwahati

Beyond COVID-19, this model based on CAT inequality could apply to the airborne transmission of other respiratory infections, such as flu, tuberculosis, and measles. (IANS)


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Rihanna was summoned from her seat to accept the honour, with the Prime Minister.

Singer Rihanna was honoured by Prime Minister Mia Mottley at an event which marked Barbados's new status as a republic, which was attended by Prince Charles. Addressing the pop star by her real name, the PM said: "Robyn Rihanna Fenty tomorrow morning shall have conferred upon her the order of national hero of Barbados."

Rihanna was then summoned from her seat to accept the honor, with the Prime Minister managing to rouse a laugh from the singer when she referenced her 2012 hit 'Diamonds', reports femalefirst.co.uk. She added: "On behalf of a grateful nation, but an even prouder people, we therefore present to you, the designee, for the national hero of Barbados." "And to accept on behalf of a grateful nation - you can come my dear - ambassador Robyn Rihanna Fenty, may you continue to shine like a diamond and bring honor to your nation." Rihanna, who was born in the St Michael parish of Barbados, found fame in 2005 after being spotted by a record producer and has since gone on to become one of the most successful female artists of all time with sales of over 250 million and recently reached billionaire status through her Fenty beauty brand.

The Prime Minister continued in her speech: "Commanding the imagination of the world through the pursuit of excellence, her creativity, her discipline, and above all else, her extraordinary commitment to the land of her birth. "Having satisfied that, Ambassador Robyn Rihanna Fenty has given service to Barbados which has been exemplified by visionary and pioneering leadership, extraordinary achievement and the attaining of the highest excellence to the Government of Barbados." It comes after a historic move for Barbados, which has become a republic after almost 400 years and welcomes its first president, Sandra Mason, after removing Queen Elizabeth as head of state. (IANS/ MBI)


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