I am Dr. Shamoon. You have asked the same doubt twice, which tells me the answers so far have not settled it, so let me give you the numbers in the clearest possible way. In the intradermal (ID) route the volume is always 0.1 ml per site - it never changes with brand, with day, or with wound severity. Only the NUMBER of sites changes. For someone taking rabies vaccine for the first time (no previous complete course), the Updated Thai Red Cross / IPC intradermal regimen is 2 sites on Day 0 (0.1 ml into the skin over each deltoid, so 0.2 ml in total that day), then 2 sites again on Day 3 and 2 sites on Day 7. For a BOOSTER - that is, a fresh exposure in someone who already completed a proper pre-exposure or post-exposure course earlier - it is only 1 site of 0.1 ml on Day 0 and 1 site of 0.1 ml on Day 3. Nothing on Day 7 or Day 28, and no rabies immunoglobulin at all, regardless of how deep the new bite is, because your memory cells respond within 48-72 hours. So, answering your Day 0 question directly: first-ever course = 2 x 0.1 ml on Day 0; booster = 1 x 0.1 ml on Day 0. The other point worth knowing is that the ID route is dose-sparing and equally effective, but only if the technique is right - the needle must stay within the skin layers and raise a small pale bleb. A dose that disappears without a bleb has gone subcutaneous and does not count.
Next Steps
1) Confirm your own category first: if you have never completed a rabies course, take 0.1 ml ID at 2 sites on Day 0, Day 3 and Day 7. If you have a documented complete course from earlier, take 0.1 ml ID at 1 site on Day 0 and 1 site on Day 3 - that is all. 2) Carry your old vaccination card; the shortened booster is only safe when the earlier course is documented. If the record is lost, treat it as a fresh course rather than guessing. 3) Have it given at an ARV clinic or district hospital that runs intradermal sessions routinely, with an insulin or 1 ml syringe. Watch for the raised pale bleb - if none appears, ask them to repeat the dose at an adjacent site immediately. 4) Keep to the dates. Day 3 means 3 days after Day 0; if you miss it, take it as soon as possible and count subsequent days from the original schedule rather than restarting. 5) Wash any fresh wound with soap under running water for 15 minutes, apply povidone-iodine, leave it unsutured if possible, and check your tetanus status. 6) If you are a first-timer with a Category III exposure (bleeding bite, mucosal contact, licks on broken skin), insist on rabies immunoglobulin infiltrated around the wound on Day 0 along with the vaccine. 7) Bring your card to a doctor if any dose was given intramuscularly by mistake - the remaining schedule then needs to be planned, not simply continued as ID. If you would like me to check your card and confirm your exact schedule and dates, you can book a consult with me on Practo, or meet me at Synergy Multispeciality Hospital, Miraj.
Health Tips
Do not postpone Day 0 while the schedule is being argued about - rabies is almost always fatal once symptoms appear, and starting on time matters more than the route. The intradermal route is not suitable if you are on steroids, chemotherapy or are otherwise immunocompromised; those patients need the full intramuscular course with immunoglobulin and a follow-up antibody titre.