Both adult and pediatric studies show that giving multiple indicated vaccines on the same day results in higher vaccine rates.
Thus, if a 65-year-old man is in your office for an annual flu vaccine and is also due for a pneumococcal vaccine then give both. Yes, the patient may say he only wants one at a time and promises to return next week for the second shot, but experienced clinicians know that for whatever reason that return visit often never happens.
In general, any 2 vaccines, live or nonlive, can be given on the same day (several exceptions exist in pediatrics).
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