Why Are Children and the Elderly More Vulnerable?
Poor air quality does not affect everyone equally. Children and the elderly are the groups most susceptible to air pollutants due to physiological and exposure differences. Children's lungs are still developing, and they breathe more air per kilogram of body weight than adults. In the elderly, the immune system and lung function weaken with age, making them more prone to respiratory and cardiovascular complications.
Understanding these risks is the first step to protecting those we care about most. In this article, we explore the specific effects of air pollution on these groups and offer practical tips to reduce exposure.
Respiratory Effects in Children: Beyond Asthma
Children exposed to high levels of air pollution, especially fine particulate matter (PM2.5) and nitrogen dioxide (NO2), have a higher incidence of acute respiratory infections such as bronchitis and pneumonia. Recent studies indicate that prenatal exposure and exposure during the first years of life can affect lung development, reducing respiratory capacity for life.
In addition to asthma, which is aggravated by pollution, there has been an observed increase in cases of allergic rhinitis, otitis media, and recurrent wheezing. In highly polluted cities, emergency room visits for childhood respiratory crises spike during episodes of poor air quality.
Cognitive Impact and Neurological Development
Air pollution does not only affect the lungs. Research has linked exposure to fine particles with cognitive problems in children, including lower academic performance, attention deficits, and alterations in working memory. The proposed mechanism involves systemic inflammation and the passage of ultrafine particles to the brain through the olfactory nerve.
A study in Barcelona found that children in schools with higher pollution showed slower cognitive development compared to those in cleaner environments, even after adjusting for socioeconomic status.
Cardiovascular Risks in the Elderly
In the elderly, poor air quality is a significant risk factor for cardiovascular diseases. Exposure to PM2.5 and ozone (O3) can trigger arrhythmias, heart attacks, and strokes. People with hypertension, diabetes, or a history of heart disease are especially vulnerable.
A study by the American Heart Association notes that for every increase of 10 µg/m³ in PM2.5, the risk of cardiovascular death increases by 8% to 18%. In the elderly, this risk is even higher due to the reduced adaptability of the circulatory system.
Aggravated Chronic Respiratory Diseases
COPD (chronic obstructive pulmonary disease) and pneumonia are leading causes of hospitalization in the elderly during pollution episodes. Ground-level ozone irritates the airways, worsening COPD symptoms and increasing the frequency of exacerbations.
Furthermore, air pollution can reduce the effectiveness of vaccines in the elderly, according to a study from Duke University, leaving them more exposed to seasonal respiratory infections.
How to Protect Yourself? Practical Tips for Families
Protecting children and the elderly from poor air quality requires a proactive approach. Here are some key steps:
- Monitor air quality daily: Use apps like Contingencias to check the Air Quality Index (AQI) in your area. Avoid outdoor activities when the AQI exceeds 100.
- Create a clean space at home: Use air purifiers with HEPA filters in the rooms where children and the elderly spend the most time. Keep doors and windows closed during high pollution episodes.
- Limit outdoor physical exertion: If the air is polluted, reduce time for play or walks. For the elderly, avoid morning exercise when ozone levels are highest (midday and afternoon).
- Use appropriate masks: N95 or KN95 masks filter fine particles. Not all surgical masks are effective against PM2.5.
- Keep vaccinations up to date: The flu vaccine and pneumococcal vaccine are especially important for the elderly and young children.
- Strategic ventilation: Ventilate the house during hours of lower pollution, typically early in the morning or after a rain.
Air Pollution and Climate Change: A Double Threat
Climate change is worsening air quality in many regions. Heatwaves increase the formation of ground-level ozone, and wildfires release enormous amounts of fine particles. In South America, biomass burning in the Amazon and the Chaco generates pollution episodes that affect millions of people, including the most vulnerable populations.
Reducing greenhouse gas emissions not only mitigates climate change but also improves air quality and protects the health of children and the elderly. Actions such as using public transportation, reducing energy consumption, and supporting clean energy policies have a direct impact on the respiratory health of our communities.
Conclusion: Prevention is the Best Tool
Poor air quality is a public health issue that disproportionately affects children and the elderly. Knowing the specific risks and adopting preventive measures can make a big difference in their well-being. Monitoring air quality, creating clean environments at home, and limiting exposure during pollution episodes are simple yet effective steps.
At Contingencias, we help you stay informed with real-time alerts and detailed forecasts. Protect your family: information is your best ally.