A.It is when a person recovers from disease B.it is when the specific severe sign symptoms appear. C.It is when the pathogen begins to invade the body D.It is the start when there are non-spesific signs and symptoms occur like fever
It is characterized by early symptoms that might indicate the start of a disease before specific symptoms occur.For example fever, malaise, headache and lack of appetite frequently occur in the prodrome of many infective disorders
