The meaning of the last seemingly incomplete sentence

The meaning of the last seemingly incomplete sentence

The passage below is from Jellyfish age backwards by Nicklas Brendborg.

Critics of the microbial theory of Alzheimer’s point to the fact that some people are infected with herpes virus but don’t develop Alzheimer’s. But, as we’ve learned, this is quite normal. Some people are infected with Helicobacter pylori and don’t get peptic ulcers. Some people are infected with Epstein-Barr virus and don’t develop multiple sclerosis. In both cases, the disease happens as a by-product of infection – the pathogen is not trying to directly induce it. That’s probably the reason why pathogens can cause disease in some people while sparing others. That, and the influence of genetics, different sub-strains, severity of infection and also randomness or luck.

The last sentence is made without predicate but only with noun phrases. I try to rewrite the sentence to make a complete sentence as follows: As with the logic of the previous sentence, the same logic applies to the influence of genetics, different sub-strains, severity of infection and also randomness or luck. (Is this rewriting OK?)

The rewritten sentence still doesn’t seem clear.

So I give it another revision as follows: as the case of pathogens, the influence of genetics, different sub-strains, severity of infection cause disease in some people while sparing others, and randomness or luck befalls on some people while sparing others. (Is this revision OK?)

Thanks in advance.