With epidemiology in the news it might be timely to note
that the first historical event affecting Granite County for which we have a
solid date is the smallpox epidemic of 1782. This event is stated in Salish accounts
to have wiped out a band of their tribe in the Bitterroot. The incident occurred at the tail end of a smallpox epidemic that raged during the Revolutionary War and gradually spread across the North American continent from
1775 to 1782. The British indeed used smallpox as a form of
biological warfare against the Colonial army.
The effects in the Northwest US and northern plains areas
are perhaps best known from David Thompson’s accounts, particularly in the
stories related to him by members of the Blackfeet nation. They told David they had caught the disease because they plundered a Shoshoni camp where
practically all the Shoshoni were dead or dying from smallpox. The result was
so devastating that the Blackfeet for a time reconsidered their traditional
aggressive war policies since they apparently suspected that the epidemic might
be spiritual payback for their constant attacks on their neighbors… what in
today’s parlance we might call “karma”.
The 1782 smallpox is only one of several cataclysmic
epidemics that wiped out most of the native population of the Northwest and
northern plains. The later waves of smallpox apparently affected every tribe
with the exception of the Flathead (Salish), who acquired immunity via a
vaccination program instituted by the Jesuit missionaries under the direction
of the noted doctor Father Ravalli.
In addition to smallpox, the Northwest was ravaged by
epidemics of measles and malaria. The measles outbreak led to the killing of missionaries in Washington
State who lacked the tools to prevent or cure the disease and so were blamed
for the numerous deaths by the local tribes. Malaria broke out in Washington state in 1829 when trading ships from the tropics inadvertently transported
malarial mosquitoes into swampland along the Columbia River. Because of
somewhat unusual weather conditions the area was temporarily suitable for breeding of
these tropical insects. Fatalities among native tribes ranged up to 100 percent
and a 95 percent death rate was typical.
It is likely that Montana, at least, was spared this particular epidemic
thanks to the cooler climate.
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