As with anyone, they were vulnerable to diseases which they had never encountered before.
Hence they had not built up any resistance or antibodies to them.
Naturally acquired active immunity means that you have contracted the disease and your body has developed immune defenses against the disease. An example if when a person gets Chickenpox- the body has memory cells which functions to produce an immune response when it recognizes the same virus later on. The immunity for chicken pox is usually lifetime.
Probably, prevailing had less to do with things that people can be proud of, than the effects of bringing a different outlook, technology and immunity to the native peoples, who were living a stone age life. Guns. Disease. Treaties that the Indians understood as lending the land, not selling it.
Labor
the Nile
High prices for supplies contributed to the creation of the farmers alliance.
High prices for supplies contributed to the creation of the farmers alliance.
Drought was the main factor that contributed to the famine in Africa. Failed government policies were another factor that contributed to widespread famine.
Hot weather.
Wich type of limiting factor are disease and parasites
Cardiovascular disease can be attributed to this uncontrollable risk factor:
Age is a risk factor for disease because as you get older, your important organs get weaker, and if they're weak then it is easier for disease to attack you.
wealth