February 2026 Health News

Why Getting Outside Matters During Cold & Flu Season

As cold and flu season settles into the Rogue Valley, it’s tempting to stay indoors. But research shows that spending time outside—especially in daylight—can meaningfully support immune health.

Lower Viral Load, Stronger Immunity

Respiratory viruses spread more easily indoors, where air recirculates. Outdoors, fresh air dilutes viral particles. Mild cold exposure and light physical activity may also boost innate immune defenses, including natural killer cells that help control viral replication early in infection. The result: fewer sick days and milder symptoms.

Vitamin D & Circadian Support

Vitamin D plays a major role in immune regulation, yet levels drop sharply in winter—especially in cloudy regions like ours. Sunlight, even through clouds, helps maintain vitamin D and supports circadian rhythms. Better circadian alignment improves sleep, which strengthens immune response.

Simple Ways to Get Outside

• Take 10–15 minute walks

• Layer up for warmth and rain

• Aim for midday light

• Pair walks with daily routines

• Use covered outdoor spaces for quick breaks

The Bottom Line

Outdoor time is a low‑cost, evidence‑backed way to reduce illness risk and support overall well‑being. This winter, treat fresh air as part of your health toolkit.

Submitted by: Steve Miller