I was living overseas (Australia) and went into the GP to request the 10 year booster for TDAP as I have been accustomed to thinking is necessary. The doctor j

I was living overseas (Australia) and went into the GP to request the 10 year booster for TDAP as I have been accustomed to thinking is necessary. The doctor just laughed and said "You must have spent time in America." The only recommendation for TDAP for adults is during pregnancy. See https://www.health.qld.gov.au/__data/assets/pdf_file/0031/989113/qld-immunisation-schedule-adolescent-adult.pdf https://www.health.qld.gov.au/__data/assets/pdf_file/0031/98... Meanwhile, in the UK, the T and D of TDAP are given just once (part of Td/IPV), with the P given only to pregnant women. See https://www.nhs.uk/vaccinations/nhs-vaccinations-and-when-to-have-them/ https://www.nhs.uk/vaccinations/nhs-vaccinations-and-when-to... Upon return to the U.S., my doctor strongly recommended getting the TDAP again since it had been well over 10 years, with 5 shots for kids and then again every 10 years. See https://www.cdc.gov/diphtheria/hcp/vaccine-recommendations/index.html https://www.cdc.gov/diphtheria/hcp/vaccine-recommendations/i... I will admit that now I have no idea what the actual best schedule for these is.