Hi My 8 Month Old Boy Got Meningitis When He

Hi my 8 month old boy got meningitis when he was 6 weeks old the doctors caught this just in time they said it was E. coli at first that leaked into the blood he was admitted into hospital for five weeks then was a loud home then at 7 months he was admitted into hospital again they done tests and said it was E. coli again around the kidneys this time and that he has to get scans to see if they are scared Why does he keep getting E. coli and wat happens if his kidneys are scared ??