Is PPSV23 alone currently routinely recommended for any adults?

No. All adults for whom pneumococcal vaccination is recommended due to age (65 or older) or an underlying condition (age 19 through 64) are now recommended to receive a pneumococcal conjugate vaccine. Prior recipients of PPSV23 alone may now receive either PCV20 or PCV15 at least 1 year after the dose of PPSV23.