Unless this system is perfectly tuned, it is going to strip a belt of warm air around people and they'll get cold. Even when air is warm, breeze can make you u

Unless this system is perfectly tuned, it is going to strip a belt of warm air around people and they'll get cold. Even when air is warm, breeze can make you uncomfortable, and in-flight air is often cool on its own. Net result might be more people becoming sick, not fewer.