Translation from scientist to normal person speak: We honestly have no fucking idea.
Sometimes, even scientists don't know what's going on. At times like that they tend to act like everyone else, which is that they assume the most popular idea must be correct. Unfortunately, this is sophistry, not science.
Dr John Snow, I am tired of your incessant prattling about Cholera being a water-born disease! There is a scientific consensus that it is spread by a miasma and that is final!