Covid-19: the inventor hoping to bring air hoods to frontline medics
百毒不侵的透明头罩

Lockdown has forced professor Mike Bradley to work out of his garden shed
专门研究微粒的麦克·布拉德利教授设计了一款据称可以阻止所有通过空气传播的病毒的头罩，他解释了这款头罩的运作原理。