Beginning, as of symptoms (5)
I believe the answer is:
onset
(Other definitions for onset that I've seen before include "Assault; beginning" , "Attack using stone" , "Appearance of" , "Beginning; military attack" , "Start - opening moments" .)
I believe the answer is:
onset
(Other definitions for onset that I've seen before include "Assault; beginning" , "Attack using stone" , "Appearance of" , "Beginning; military attack" , "Start - opening moments" .)