Can anyone tell me what is the best way to memorize historical note

To memorize historical note, I usually color-code the words of the note. Another method is imagining the words like people in a story. These are the methods I use all the time. For memorizing digits of Pi I color-code and for example whenever I see the digit 3 in Pi I think of grumpy cat, which is a character. Another way is keep reading the note until it annoys you like and overplayed song and you know the words to the song even though you don't want to remember it. Hope this helps and my methods are effective enough for you to memorize your historical note!!!

Say your notes out loud until you memorize them. It always helps me.

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.