As spring arrives, seasonal allergies return—but they're intensifying. A major study reveals pollen levels have risen globally over the past two decades, a trend set to accelerate.
With France easing COVID-19 restrictions, the virus remains a concern. Now, spring brings seasonal allergies back into the spotlight. A cough or sneeze draws stares, as coronavirus symptoms overlap with allergy signs like these. Distinguishing between them can be challenging—consult a doctor if unsure.
Looking ahead, pollen won't subside anytime soon. Research commissioned by the U.S. Department of Agriculture and published in The Lancet Planetary Health in March 2019 shows pollen concentrations have increased worldwide over the last 20 years, correlating directly with rising average temperatures.
This rise in seasonal allergies poses a major health and economic burden. The World Health Organization (WHO) ranks allergic diseases as the fourth most common chronic condition globally, labeling them a significant public health issue. They impact quality of life, cause lost work and school days, drive up treatment costs, and even contribute to mortality in severe cases.
The study projects less distinct seasons due to climate change, potentially extending allergy seasons across more of the year. Elevated carbon dioxide levels may boost pollen production in plants, leading to more plants—and thus more pollen—next season. Researchers predict pollen amounts could double in parts of the United States by 2040, with similar trends likely worldwide, including Europe.
