When jenner developed the first vaccine he was using the observation of milk maids who after having cowpox they were immune to smallpox after having chickenpox they were immune to smallpox after being infected with the flu virus they were immune to smallpox after developing hiv they were immune to smallpox

Why did the federalists support the ratification of the constitution? they believed in a strong federal government. they thought that it would end slavery. they were afraid the british would take over again. federalists believed the constitution provided just the right mix of power and limitations on power.