When an infectious airborne illness strikes, some hospitals use negative pressure rooms to isolate and treat patients. These rooms use ventilation controls to keep germ-filled air contained rather than letting it circulate throughout the hospital. But, in the event of an epidemic, these rooms can quickly fill up. Now, a team at °ÄÃÅ¿ª½±½á¹û2023¿ª½±¼Ç¼ has found a simple, cost-effective way for medical facilities to expand this technique to better prepare for disease outbreaks.