As the Harmattan season begins, the air in Lagos is filled with more than just desert dust, bringing relief to some, but for many, it signals the start of an annual struggle with respiratory issues. By midday, pharmacies and clinics are busy with people seeking relief from sneezing and wheezing, a phenomenon that is all too familiar. However, the true culprit behind these symptoms is not just dust, but billions of tiny pollen grains that are powerful enough to affect the daily lives of thousands of Nigerians.
Seasonal symptoms, once viewed as a minor nuisance, are now being recognized as a preventable crisis. Research indicates that over one in four Nigerians suffer from allergic rhinitis, with a significant number of cases concentrated in urban areas where pollution and unplanned growth trap irritants in the air. The World Health Organization has warned that rising temperatures and carbon dioxide levels are leading to longer and more intense pollen cycles globally, a trend that Nigeria is now experiencing firsthand. Erratic rainfall and expanding urban greenery are also contributing to the problem, introducing new allergens into communities and stretching pollen seasons.
In Abuja, scientists have observed a sharp increase in pollen concentrations during the late rainy season and Harmattan, which is attributed to the release of grains from grasses, weeds, and palm trees. The TETFund Allergy Project at the University of Lagos has found a link between these peaks and spikes in asthma, sinus infections, and eye irritation.
According to pulmonologist Dr Obianuju Ozoh, “It is expedient to identify those plants producing airborne pollen allergens for proper diagnosis and treatment.” Without this knowledge, thousands of cases may continue to be misdiagnosed or ignored. A study conducted in Lagos in 2015 recorded nearly 3,500 airborne pollen and spore particles in just three months, mostly from grasses and sedges, and found that rainfall and humidity reduced pollen levels, while drier months triggered dramatic spikes.
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Nigeria has a solid foundation for building a national forecasting model, with the Nigerian Meteorological Agency (NiMet) tracking environmental factors such as rainfall, temperature, humidity, and wind speed. Integrating pollen monitoring into NiMet’s existing network could provide major public-health benefits, enabling the country to track invisible health threats alongside traditional weather risks. Other countries, such as the United States, Japan, and much of Europe, have already implemented national pollen-monitoring systems, issuing daily forecasts that help doctors anticipate hospital surges and warn citizens of potential symptoms.
Technology companies, such as Google, are also playing a role, using satellite images and weather data to provide hyper-local alerts to users. The goal is to predict allergic reactions before they happen and prevent avoidable suffering.
Nigeria has the right institutions to make this happen, with NiMet collecting national climate data, the Nigeria Centre for Disease Control (NCDC) monitoring respiratory-disease trends, and the Federal Ministry of Health coordinating national surveillance. Universities such as the University of Lagos and Ahmadu Bello University could serve as scientific partners, establishing a National Pollen Monitoring Network that feeds data from weather stations directly into health dashboards.
