A client with symptoms of influenza that started the previous day, asks the clinic nurse about taking oseltamivir to treat the infection. Which response should the nurse provide?

Refer the client to the healthcare provider at the clinic to obtain a medication prescription.

Explain to the client that antibiotics are not useful in treating viral infections such as influenza.

Instruct the client that over-the-counter medications are sufficient to manage influenza symptoms.

Advise the client that once symptoms occur it is too late to receive an influenza vaccination.