Iron lung

An iron lung, also known as a tank ventilator or Drinker tank, is a type of ventilator which encases a person's body except for the head, and changes the air pressure in the space, to help them breathe. The use of this device is usually for victims of polio and botulism.
The use of iron lungs is largely not used because of more modern ways to help breathing problems and since the eradication of polio. However, in 2020, the COVID-19 pandemic made people think reusing this would be a good idea.