The recommended course for adults is Prevnar 13 followed by Pneumovax with ≥8 weeks in between (to not overwhelm the immune system).
PFE and MRK are each developing pneumococcus vaccines to supersede Prevnar 13 and Pneumovax, respectively, but these products probably won’t be on the market until 2021. Please see #msg-154439687 for related discussion.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”