Do you know what it is? In New Zealand, inhalation chambers were installed in public buildings in 1918 and people were asked to inhale a gas (zinc sulphate) that would protect them from the flu. Conclusion: people got very sick and many died. To use public trains, you needed… pic.twitter.com/kc894eXR2O

— Peter Choden (@betterworld_24) April 6, 2024