A 57-year-old patient is due for a vaccine. Given their last tetanus booster was 9 years ago, which vaccine is indicated?

The appropriate vaccine indicated for a 57-year-old patient who received their last tetanus booster 9 years ago is the TD vaccine, which stands for Tetanus and Diphtheria. According to the Centers for Disease Control and Prevention (CDC) guidelines, adults should receive a Td booster every 10 years to maintain immunity against tetanus and diphtheria. Since the patient's last booster was 9 years ago, it would be time for them to receive their Td booster.

Influenza vaccination is recommended annually, but it is not a replacement for the tetanus booster, which specifically addresses protection against tetanus and diphtheria. Pneumococcal (PNA) vaccine and Hepatitis B vaccine are also important, but their indications depend on specific risk factors and immunization history. In this scenario, the pressing need for a tetanus booster is the priority. Hence, the TD vaccine is the correct answer.