Over the past 12 weeks, infectious disease risk generally declined with some fluctuations, and the current week shows a lower risk relative to recent weeks..
Allergens risk increased steadily over the last 12 weeks and remains elevated in the current week compared to earlier weeks..
Pollution risk has remained consistently low and stable throughout the past 12 weeks with no significant changes in the current week..
Severe Weather risk showed intermittent spikes during the 12-week period and is currently at a moderate level, reflecting an upward trend from the lowest points..
Last updated: May 24, 2026
Data refreshed weekly