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1. Pneumococcal vaccines are most effective in preventing which of the following types of infection? (Required.)

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2. Which of the following would not place an adult <65 years at increased risk of pneumococcal disease and requiring vaccination? (Required.)

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3. Which of the following is a recommended pneumococcal vaccine regimen for a 52-year-old man with type 2 diabetes mellitus and no prior history of receiving a pneumococcal vaccine? (Required.)

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4. Which of the following is recommended for a 70-year-old woman who received the PPSV23 vaccine 3 years ago? (Required.)

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