Across
 
1.     This is the interval between entrance of pathogen into the body to the appearance of first symptoms.
2.     This is the stage when the sick person exhibits signs and symptoms specific to type of infections
3.     This is the interval when acute symptoms of infection disappears (length depends on severity of infection and sick person’s state of health).
 
Down
 
4.     This is the interval from the onset of nonspecific signs and symptoms to the appearance of more specific symptoms time. When microorganisms grow and multiply, and the sick person may be more capable of spreading disease to others.
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