Asthma-Associated Emergency Department Visits During the Canadian Wildfire Smoke Episodes - United States, April- August 2023

Published on August 24, 2023

This report describes asthma-associated emergency department visits across the U.S. during 19 days of wildfire smoke.

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Recommendations and Reports: Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices - United States, 2023-24 Influenza Season

August 23, 2023
This report describes prevention and control of seasonal influenza with vaccines for the 2023-24 season.

Tropical Forests May Be Getting Too Hot for Photosynthesis

August 25, 2023
This article describes that when trees get too hot, energy production in their leaves breaks down. The study, published on Wednesday in Nature, finds that even when the surrounding air is significantly cooler than the leaves themselves, some 0.01 percent of individual leaves can reach a critical temperature at which the enzymes required for photosynthesis go through a process called denaturation—t