A Patient Has a Positive Test for Influenza Type a and Tells

A patient has a positive test for influenza type A and tells the nurse that symptoms began 5 days before being tested. The prescriber has ordered oseltamivir [Tamiflu]. The nurse will tell the patient that oseltamivir:

A) may decrease symptom duration by 2 or 3 days.
B) may not be effective because of the delay in starting treatment.
C) may reduce the severity but not the duration of symptoms.
D) will alleviate symptoms within 24 hours of the start of therapy.