I think that russian is a nut. Let's take one comment and debunk it:
he thought the pneumonia was man-made because "there is no vaccine for this virus, its make-up is unclear, it has not been very widespread and the population is not immune to it."
By that reasoning, Spanish Flu must have been man-made too ... and every virus we've ever had prior to that.
Most of the other things that have been mentioned are risks associated with living, such as driving, or lifestyle such as heart disease that we can do something about to a certain extent.
Others like cancer are more 'long-term' - you don't suddenly catch cancer off someone else and drop dead a week later.