allergy map (IMAGE) PNAS Nexus Caption Seasonal patterns in allergy intensity across 144 counties in the United States with a population above 500,000. Spring months (March - May) represent the dominant allergy season and fall months (September - October) represent the second most prominent season; summer and winter allergy seasons are less pronounced but can be important in specific regions (including Colorado, Florida, and Texas). Credit Elias Stallard-Olivera and Noah Fierer Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.