Hi, My Mom Says I Was Very Sick Infant, To

Hi,
My Mom says I was very sick infant, to the point that they thought they were going to lose me and
the family Dr. told them to wait on baptizing me. I must have been 1-3 weeks old, because Catholics baptized infants early back in 1958.
When I asked my Mom, "what did I have", she blurted out the name Numminitus (phonetically spelled).
Could you give me an idea of what that is exactly & the symptoms for a week old infant? I am wanting to understand all my health history and mom is 82 and very ill.
Thank you!