Information can be found on various diseases/immunization information as well as travel guidelines including immunization recommendations for travel outside of the US.
Prevnar 13 - Pneumonia Vaccine - http://www.cdc.gov/vaccines/hcp/vis/vis-statements/pcv13.html
Pneumovax - Pneumonia Vaccine - http://www.cdc.gov/vaccines/hcp/vis/vis-statements/ppv.html
Zostavax - Shingles Vaccine - http://www.cdc.gov/vaccines/hcp/vis/vis-statements/shingles.html
International Travelers Health - http://wwwnc.cdc.gov/travel/destinations/list