Hellame // Shutterstock The “winter blues” are real. Seasonal affective disorder (SAD) affects roughly 5% of U.S. adults, and...
seasonal
The “winter blues” are real. Seasonal Affective Disorder (SAD) affects roughly 5% of U.S. adults, and nearly 4 in 10...
Key factsThere are around a billion cases of seasonal influenza annually, including 3–5 million cases of severe illness.It causes 290 000 to...
