Explain the difference between an infection caused by a fungus and an allergy caused by a fungus

Re-posting some old information I found on this website

When a fungus infects a body, it attacks the host by destroying and often taking over cells. When a person has an allergic reaction (to anything) the substance triggers the body to send histamines and excess water to the affected area, swelling and closing the area to prevent infection. - Answer Provided by ChaoticPiece