He was born with blocked tear ducts, which is incredibly common, about 50% of babies have at least one blocked duct, you can tell because they get a bit goopy (The membrane that allows them to drain hasn't opened yet.) It's common for them to get a bit inflamed and slightly infected but usually they resolve on their own if you clean them with plain water, or with a bit of eye drops from the doctor. In his case in a matter of hours essentially, the tear ducts became severely infected. Newborns are not good at keeping infection in one place, so it spread through his blood and became systemic. So it wasn't really a matter of picking anything up, a common newborn issue just turned into a complete health disaster.