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 conjugate vaccine. Prior recipients of PPSV23 may now receive either PCV20 or PCV15 at least 1 year after the dose of PPSV23. Adults who have had PCV13 should receive PPSV23 as recommended for them before the introduction of PCV15 and PCV20, based on age or risk factors, as described elsewhere.