This is really interesting. There was a shift from H1 viruses to H3 viruses in the 1960's.A person's chance of falling ill from a new strain of flu are at least partly determined by the first strain they ever encountered, a study suggests.
Constipation Linked to Risk of Kidney Disease, New Study Finds
They suggest the microbiome. And inflammation. Which is a pretty vague guess.
One hundred dollars says this is evidence of Strep B which colonizes both the intestines and urinary tract.
Multi-drug resistant infection spreading globally among cystic fibrosis patients