Historic, grainy black-and-white photo of a 1918 field-hospital or ward with nurses; large tan headline over the image. URL along the top, WHN logo in the corner. Full text on image: “whn.global/fresh-air-saved-lives-in-1918-we-sealed-covid-in/ In 1918, doctors did something obvious. They opened the windows. It wasn’t complicated technology. It was air.” Footer: “The World Health Network is a network devoted to global compassion—working together to inspire collective action through science for a safer, healthier world.”

Black background with a vintage black-and-white photo of a sign that says to keep bedroom windows open; large tan headline and smaller white body text above the photo; WHN logo and URL on top. Full text on image: “whn.global/fresh-air-saved-lives-in-1918-we-sealed-covid-in/ In 1918, doctors didn’t have advanced medicine or modern technology. They had observation, urgency, and a willingness to do what worked. They noticed something simple: people got sicker faster indoors, and recovered better when they could breathe fresh, moving air. So they opened the windows.” Footer: “The World Health Network is a network devoted to global compassion—working together to inspire collective action through science for a safer, healthier world.”

Black background with a large black-and-white photo across the bottom of a person opening a wide home window; tan headline and white paragraph text above; WHN logo and URL at top. Full text on image: “whn.global/fresh-air-saved-lives-in-1918-we-sealed-covid-in/ By the time COVID arrived, this knowledge wasn’t lost, it was documented. We had decades of research explaining how respiratory viruses spread, and a full century of lessons from past pandemics. But instead of applying what we already knew, we sealed ourselves indoors and treated airflow as an afterthought.” Footer: “The World Health Network is a network devoted to global compassion—working together to inspire collective action through science for a safer, healthier world.”

Muted photo of a modern construction site/HVAC framing in the background; big tan quote headline with white body text; URL at top, WHN logo in corner. Full text on image: “whn.global/fresh-air-saved-lives-in-1918-we-sealed-covid-in/ ‘Modern construction creates perfect virus chambers.’ Modern buildings are designed to trap heat, reduce airflow, and recycle the same air over and over again. These choices weren’t made for health, they were made for efficiency. When a virus that spreads through the air arrived, it moved easily through the spaces we had created. Classrooms, care facilities, workplaces… all became high-risk by design.” Footer: “The World Health Network is a network devoted to global compassion—working together to inspire collective action through science for a safer, healthier world.”