Answer:
C. Women were legally allowed to practice medicine.
D. The smallpox vaccine was developed.
Step-by-step explanation:
To key development in health care that took place between the 1600s till the 1800s include;
1. Women were legally allowed to practice medicine: Prior to this time, women's involvement in medicine was significantly banned during the reign of King Henry VIII of England. It was not until the 1800s that women began receiving licenses to practice medicine. For example, Elizabeth Blackwell was the first woman in the United States to graduate from Medical School. This happened in 1849.
2. The smallpox vaccine was developed: The smallpox vaccine was developed by Edward Jenner in 1796 when he made the observation that people who had previously been infected with cowpox did not come down with smallpox.