according po to doc chris from our last #askdok session: "tetanus schedule is after the first injection, the next should be after 1 month, then the last will be between 6 to 12 months after the first injection. pede naman ma-delay as long as makuha mo lahat ng injection within the year"
https://community.theasianparent.com/q/ask-dok-0408-chris-soriano-official/1911564