Who discovered the first successful treatment for typhoid fever?

Who discovered the first successful treatment for tetanus?

Who discovered the first successful treatment for sleeping sickness?

Who discovered the concept of the gene?

Who discovered the first successful treatment for HIV/AIDS?

Who discovered the concept of the laser?

Who discovered the first successful treatment for bacterial infections?

Who discovered the concept of the immune system?

Who discovered the concept of continental drift?

Who discovered the first successful treatment for scurvy?