Final answer:
The nurse should advise the child to avoid contact sports and heavy lifting.
Step-by-step explanation:
The accurate information given by the nurse to the parents about the care of the child diagnosed with infectious mononucleosis is to advise the child to avoid contact sports and heavy lifting.
Infectious mononucleosis is a common and mild infection caused by the Epstein-Barr virus or cytomegalovirus. It is primarily spread through contact with body fluids such as saliva. The main symptoms include pharyngitis, fever, fatigue, and lymph node swelling. Avoiding contact sports and heavy lifting helps prevent complications such as spleen rupture caused by enlargement.