Human health timeline: 1930s
The most widely used modern intravenous anaesthetic is thiopentone sodium. Effective doses of this barbiturate were established by researchers at the University of Wisconsin working with rats, rabbits and dogs.
Tetanus vaccine allows your body to create antibodies against the tetanus toxin (tetanospasmin). This protects you from the illness if you are exposed to the Clostridium tetani bacterium in the future.
In 1888 Pierre Roux and Alexandre Yersin showed that the liquid in which the bacterium Corynebacterium diphtheriae had been grown caused diphtheria, by injecting it into guinea pigs, rabbits, dogs, cats and horses.
Blood clotting (coagulation) disturbs blood flow, and is essential to stop bleeding after a cut. But clotting in the wrong place can lead to deep vein thrombosis, pulmonary embolism, heart attacks and strokes. Anticoagulants are used to prevent or treat these.