How Secondhand Smoke Is Harmful In the Long and Short Term


Jan 1, 2020


One of the major challenges to public smoking, which has also spurred anti-smoking legislation in many countries in recent years, has centered around secondhand smoke (SHS) — smoke arising from the end of a burning cigarette (sidestream smoke), combined with that being exhaled from the person smoking the cigarette (mainstream smoke) — that harms non-smokers. 

India, for example, in compliance with the World Health Organization (WHO) Framework Convention on Tobacco Control, bans smoking in many public spaces — in healthcare, educational and government institutions, on public transport, and in auditoriums, stadiums, railway stations, bus stops and stands. In establishments such as airports, hotels or restaurants, a designated smoking area is established for smokers, so they don’t inflict secondhand smoke on non-smokers.

According to the Global Adult Tobacco Survey, however, Indian workplaces are not free of tobacco smoke yet — 30.2% Indian adults are exposed to secondhand smoke at their workplaces. In addition, 48.8% of Indian households are rife with tobacco smoke, with a greater prevalence in rural India. While India’s anti-smoking laws for the public good have been in response to a growing body of research that highlights the harms of passive smoking, their lax implementation signals the dangers of passive smoking have not been driven home yet.

According to the Cleveland Clinic, cigarette smoke contains 4,000 chemical compounds, 250 of which are toxic, and 50 of which are cancer-causing toxins. These linger in the air for four hours after a person has smoked in an area. Five minutes of exposure to these toxins in the air “stiffens the aorta as much as smoking a cigarette”; 20-30 minutes of exposure “causes excess blood clotting, as well as increases the buildup of fat deposits in blood vessels, increasing the risk of heart attack and stroke”; two hours of exposure “increases the chance of irregular heart beat (arrhythmia) and can trigger a fatal cardiac event or heart attack.”

Long-term passive smoking habits — cohabitating with a habitual smoker, for example — can cause lung cancer and other lung diseases such as emphysema, asthma and chronic bronchitis, according to the Cleveland Clinic — the risk of developing these through passive smoking increases by 20% to 30% by living with a smoker. Other ailments caused by secondhand smoke include heart disease, sinus, and respiratory infections. According to the American Cancer Society (ACS), passive smoking has also been linked to signs of depression in those routinely exposed to secondhand smoke. 

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Young children, especially, are vulnerable to the physically detrimental health consequences of secondhand smoke, the ACS reports. “Most of their exposure to SHS comes from adults (parents or others) smoking at home,” which results in them getting sick more often, experiencing frequent lung infections, and being more prone to coughs and ear infections. Passive smoking can also cause asthma attacks and make asthma worse in children, according to the ACS. 

“Some of these problems might seem small, but they can add up quickly. Think of the expenses, doctor visits, medicines, lost school time, and often lost work time for the parent who must stay home with a sick child. And this doesn’t include the discomforts that the child goes through,” according to the ACS. 

Secondhand smoke can also increase risks of Sudden Infant Death Syndrome (SIDS) — an unexpected death of an infant in their first year of life, according to the Centres for Disease Control and Prevention (CDC). Not only are infants exposed to secondhand smoke at greater risk for SIDS, their brain activity and subsequent breathing levels are also affected by passive smoking. 

In order to protect non-smokers from secondhand smoke, the CDC recommends not to smoke in or near home, inside cars, or in public areas. As for how to protect smokers, well, that’s a whole different ballgame — one the Indian government seems to be losing.


Written By Rajvi Desai

Rajvi Desai is The Swaddle’s Culture Editor. After graduating from NYU as a Journalism and Politics major, she covered breaking news and politics in New York City, and dabbled in design and entertainment journalism. Back in the homeland, she’s interested in tackling beauty, sports, politics and human rights in her gender-focused writing, while also co-managing The Swaddle Team’s podcast, Respectfully Disagree.

  1. Audrey Silk

    The entire so-called “secondhand smoke” issue is a fraudulent house of cards, each card and level built by the same handful of prohibitionist researchers and organizations who then cite each other’s works to claim “a mountain of evidence.” But their mountain is one of crap. Built in order to advance their anti-smoking agenda by tapping into the fears of non-smokers in order to create societal pressure to approve their prohibitionist policies. Anyone who looks at the actual studies and not just headlines or repeating what they have printed will find that their claims are methodologically flawed and the data tortured to arrive at their preconceived conclusions. No one mentions the larger studies that have found no harm from being around a smoker. Why not? Too scared to let people know that controversy remains over these claims and to let people have all the info in order to weigh it themselves?


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