10 brands of Baby Wipes have been recalled both in canada and the US due to bacterial contamination----specifically, B. cepacia, which is a human respiratory pathogen in people with weakened immune systems or chronic lung disease.
Baby wipes contain quite a bit of PG as well as certain alcohols that are also bacteriostatic.
In the past, several states had clusters of pneumonia and other infections caused by the bacteria, which ended up being connected to contaminated mouthwash. Mouthwash has quite a lot of PG and/or alcohol in it.
I think science research articles are great, but you have to use real science when interpretting them as well.
I will not attempt to comment on the inability of pathogens to stay alive in ejuice since I am not a scientist, but I think there has to be an answer somewhere.
As Steamix said, our immune systems are designed to deal with stuff......and then sometimes, they don't.
The makers of the nautilus have warnings on the boxes that say how often you should change out a coil. I would follow those recommendations.