Final answer:
Zanamivir (Relenza) is an inhalable antiviral medication used to treat influenza. The specific age at which it may be given to children is not mentioned.
Step-by-step explanation:
Zanamivir (Relenza) is an antiviral medication used to treat influenza. It is administered through inhalation, meaning it is inhaled into the lungs. According to the information provided, the specific age at which zanamivir may be given to children is not mentioned. It is best to consult with a healthcare professional or refer to the drug's prescribing information for the appropriate age range.