Hello Covid, my old foe
The strongest takeaway here is not that one precaution guarantees safety, but that layered risk reduction is more credible than any single measure. For people living with long Covid, the concern is less about a dramatic one-off exposure and more about cumulative vulnerability: another infection may add stress to an already unstable recovery. That idea is biologically plausible, but the exact size of the risk from reinfection is still uncertain and will vary by person, viral variant and timing.
It is also worth separating prevention from certainty. Masks, ventilation and avoiding crowded indoor settings are best understood as tools that lower the odds of exposure, not as proof that infection will never happen. In real life, adherence matters: a highly protective strategy that is too uncomfortable or socially difficult to maintain may be less useful than a modest one that people can actually keep doing. That makes practicality part of effectiveness, not an afterthought.
Another useful lens is shared responsibility. Clean indoor air helps not only the person at highest risk, but everyone who uses that space. Opening windows or improving filtration is often framed as a personal choice, yet it functions more like a background public-health measure. The challenge is that benefits are diffuse and invisible, which can make these steps harder to prioritise until illness is already present.
For readers, the editorial point is simple: prevention in this context is about reducing avoidable exposure while accepting uncertainty. That stance is more evidence-informed than treating repeated infections as harmless, but it also avoids promising perfect protection. In chronic post-viral illness, modest risk reduction may be the most realistic goal.
Masks, outdoor activities and air purifiers
Itโs been more than two years since I was infected with Covid which developed into long Covid, and my life has not been the same since. It was my first positive test, but itโs possible that I caught the virusย in March 2020 when mass testing wasnโt yet available. Back then, I had already started self-isolating before national lockdowns were implemented and I didnโt think much of this bout of sickness until years later, when I heard that repeat infections could increase the risk of developing long Covid.
As one ofย millions of people around the world suffering from long Covid, I have been learning how to live with the condition. I avoid alcohol and late nights, and have to dial back on socializing on the days when Iโm feeling triggered. Thatโs why the idea of getting infected again terrifies me, because it can undo the progress Iโve made during my long Covid recovery. Getting sick in general can cause problems: last year, I developed hives after a common cold and now take anti-histamines every day to keep the itchiness away.
โIt seems like each new infection could potentially be a new situation for the virus to potentially down-regulate the immune system and create a better environment for the reactivation of other dormant pathogens,โ saysย Amy Proal, president of PolyBio Research Foundation, a non-profit that facilitates research into chronic, infection-associated conditions. The idea that getting regularly infected would only strengthen the immune system is โwishful thinking,โ she added.
Now, I take extra precautions compared to pre-pandemic times. If a friend tells me theyโre sick โ even if they say itโs mild or that theyโre feeling fine โ Iโll suggest catching up another time. Iโll order my own food when out for a meal with others, or insist on using serving spoons if weโre sharing some dishes. At the first sign of a sore throat or swollen glands, I use a nasal spray designed to prevent full-blown colds.
Covidย is spread via airborne particles and droplets. So to avoid getting reinfected, Proal suggests wearing a well-fitted N95 respirator mask particularly in crowded spaces, socializing outdoors where air movement is better, opening windows when inside to the extent that itโs possible and using HEPA filters to improve indoor air quality.
โClean your air,โ she says. โYou can just be in a room with someone whoโs sick and if theyโre breathing enough into the air and the airโs not getting turned over, it just kind of clouds like a cigarette smoke cloud.โ โย Lisa Pham
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