Why were Europeans less vulnerable to most diseases than Native Americans?
AThey had built up immunities.
BThey never came into contact with them.
CNative Americans were less hygienic than Europeans.
DNative Americans did not practice medicine like Europeans.
AThey had built up immunities.
BThey never came into contact with them.
CNative Americans were less hygienic than Europeans.
DNative Americans did not practice medicine like Europeans.