Salerno, Italy during the 1000s established he first school of medicine.

 During the 1200s strict measures for public hygiene was instituted.

During the 1300s the first dissections of human corpses were demonstrated.

 During the ancient times, the Chinese created an alternative medicine; acupuncture. This form of alternative medicine is over 5000 years old. 

 The first scientific study of human anatomy was published during the 1500s. 

 A Dutch spectacle maker created the microscope in 1590, this would help the health field by being able to see bacteria, and viruses along with other microscopic things. 

 During the 1600s blood circulation was first described, and bacteria was discovered. 

First law requiring licensed medical practitioners and obstetrics established as aseparate branch of medicine all occured during the 1700s.

Benjamin Franklin invented the bifocals in the 18th century.

The first life insurance policy was issued in the United States.

Edward Jenner developed the vaccine for smallpox.

The first practical anesthetic was introduced.

 Louis Pasteur began pasteurizing milk to kill bacteria. 

 Gregor Mendel established the patterns of heredity, by using the pea plant. 

 The germ theory was introduced. The germ theory is a proposal that microorganisms are the cause of many diseases. This proposal came from Louis Pasteur a French microbiologist. 

 Clara Barton founded the American Red Cross. 

The rabies vaccination was discovered. And rabies is a deadly viral infection that is mostly spread through infected animals.

 William Roentgen discovered x-rays. 

 During the 1900s the four major blood types were discovered: O, A, B, and AB.