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As the last days of summer slip away, we stand on the brink of autumn—and the start of the fall respiratory season. While the vibrant colors and crisp air are a welcome change, so too are the inevitable coughs, sneezes, and colds that come with it. To protect your family and yourself, being prepared is key.
Some people might think the solution is as simple as installing an air filter. But before you buy one, know this: not all filters are created equal. Researchers caution that some air purification devices can actually release harmful substances like ozone or formaldehyde into your home. Furthermore, studies on the effectiveness of many consumer models are limited.
So, what should you look for? Dr. William Checkley, a lung specialist at Johns Hopkins University School of Medicine, recommends a HEPA filter for those with chronic conditions like asthma or COPD. These filters are highly effective at trapping common allergens and irritants such as dust, pollen and mold. He also notes that these are a good choice for areas with poor outdoor air quality but reminds users to change the filters regularly to maintain their effectiveness.
For the general public, a filter with a Minimum Efficiency Reporting Value (MERV) of 13 or higher is a smart upgrade. These can even trap tiny particles like viruses. However, before you swap out your old filter, check your HVAC system’s capabilities. A MERV 13 filter creates more airflow resistance and may be too much for a system designed for a lower-rated filter (like a MERV 8).
While air filters can certainly help, they aren’t a silver bullet. Experts agree that the best ventilation is the simplest: open your windows and let the fresh air in. But most importantly, no filter can replace the fundamental habits of frequent hand washing and getting your seasonal vaccines.
For those without the means to invest in a filtration system, Dr. Shira Doron, an infection control expert at Tufts Medicine Health System, offers a powerful reminder about the simplest forms of protection. “To a large degree, respiratory infections are inevitable,” she says, “so you want to be healthy when you get one.” Her advice is straightforward: stay out of the direct line of a cough or sneeze and avoid shaking hands with someone who is sick.
Ultimately, Dr. Doron stresses that the best defense is a strong offense, which means focusing on your overall health. This includes eating a balanced diet, getting plenty of quality sleep, managing stress, and keeping any chronic medical conditions—like diabetes or heart disease—under control.
Show up in life as your best self, and you’ll be well-prepared for whatever the season brings.
