Examples: discovery of antibiotics, heart transplants, dental implants, noninvasive surgery, anesthesia, vaccinations etc.
Acupuncture!
aw
shot
Start with Penicillin and go from there.
the establishment of chemistry
trh
He discovered the vaccine for poliomyelitis.
For example, if the per-unit variable cost is $15 and selling price per unit is $20, then the contribution margin is equal to $5. The contribution margin may provide a $5 contribution toward the reduction of fixed costs or a $5 contribution to profits.
Surgical infection
clothes, medicine, food, and accesories
Example: I've got to be honest your contribution to this presentation was the greatest
The invention of the microscope, enabling enormous advancements in biology, medicine and other areas.