Answer:
When did many African groups begin to challenge European colonial
rule? African groups began to challenge European colonial rule after ww2
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Positive psychology.
Positive psychology is the psychology of happiness and the pursuit of happiness in humans.
This would demonstrate this isn't the right pathogen that has been causing illness.It could imply that the hosts have a characteristic insusceptibility or the pathogen is a symbiont, or not harmful microscopic organisms.
The suspected pathogen must be found for each situation of ailment and not be found in healthy people. It can be isolated and developed in pure culture.