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Researchers find growing body of evidence that airborne transmission of Covid-19 spreads more quickly in enclosed spaces. Pexels

A new research adds to the growing body of evidence that airborne transmission of Covid-19 spreads more quickly in enclosed spaces.

Researchers were able to link a community outbreak of Covid-19 in China to a source patient who likely spread the virus to fellow bus riders through the bus’s air conditioning system.


“Our study provided epidemiologic evidence of transmission over long distances, which was likely airborne,”

said study lead author Ye Shen from University of Georgia in the US.

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According to the study, published in the journal JAMA Internal Medicine, it was largely believed that close contact through droplets is a major route of transmission for Covid-19.

“However, the widely adopted social distancing and hand washing did not effectively prevent the transmission globally. Instead, the number of new Covid-19 cases increased steadily,”

said Shen.

The research team worked with epidemiologists from two regional Centers for Disease Control and Prevention in China to trace infections following a large outdoor worship event in Zhejiang province. Some of the attendees, it turns out, took two buses to the event creating a unique natural experiment for the researchers.

Both buses had closed windows and had air conditioning running, said Changwei Li, study co-author, but one bus carried a patient infected with the virus, and the other did not. Of the passengers who later got sick, the majority of them rode on the same bus as the source patient.


Covid-19 could be spread through fine aerosol particles being circulated in an enclosed space. Unsplash

Even though the two groups later mixed in with the larger crowd at the worship event, the number of new cases attributed to the event were much lower, suggesting that the bus was the major point of transmission.

Further, some of the bus passengers who later showed symptoms of Covid-19, the authors found, were not sitting close to the infected passenger. These findings highlight scenarios where Covid-19 could be spread through fine aerosol particles being circulated in an enclosed space.

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“Understanding the transmission routes of Covid-19 is critical to contain the pandemic, so that effective prevention strategies can be developed targeting all potential transmission routes,”

said Shen.

“Our findings provide solid support for wearing face covering in enclosed environments with poor ventilation,” the study author wrote.

Recently, another study published in the journal Proceedings of the National Academy of Sciences, found that ordinary conversation creates a conical ‘jet-like’ airflow that quickly carries a spray of tiny droplets from a speaker’s mouth across metres of interior space. (IANS)


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The aim of the book is to teach children that families can exist in different forms, and show them how to accept the diversity in family backgrounds.

By Siddhi Jain

Delhi-based author Pritisha Borthakur is set to release her new book, 'Puhor and Niyor's Mural of Family Stories'. The 1,404-word children's book was put together to address a new kind of societal debacle in the family system. The author says the aim is to teach children that families can exist in different forms, and show them how to accept the diversity in family backgrounds.

The author who named the book after her twin sons -- Puhor and Niyor -- is a parent who has seen and heard the tales of ridicule and discrimination suffered by many in India and beyond. She says the book is an artistic illustration for kids that details how different families can live and coexist. Whether it's children with two dads or two moms, children with a single dad or single mom, and even multiracial family units, Borthakur's book teaches love, understanding, and compassion towards unconventional families.

Beyond race, gender, color, and ethnicity which have formed the bases for discrimination since the beginning of time, this book aims to bring to light a largely ignored issue. For so long, single parents have been treated like a taboo without any attempt to understand their situations; no one really cares how or why one's marriage ended but just wants to treat single parents as villains simply for choosing happiness and loving their children.

Homosexual parents, a relatively new family system, is another form that has suffered hate and discrimination for many years. Pritisha emphasizes the need to understand that diversity in people and family is what makes the world beautiful and colourful. 'Puhor and Niyor's Mural of Family Stories' is a firm but compassionate statement against all forms of discrimination on the bases of sexual identity, gender, race, and even differences in background

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