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Animal bite
When is the 3 month (90) day rule followed after taking the full ARV (anti-rabies )vaccine intradermal 4 doses(0,3,7,28)days? 0 days on the day of taking the first dose or 28 days on the day of taking the last ARV dose. If there is a dog bite again, from which day should we count? First day of previous (ARV) vaccine or last days? I'm worried
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The 90 days is counted from the last dose day 28 of your previous ARV schedule.
If a bite or an exposure happens
Within 3 months of last dose only 2 booster doses day 0 and 3 are needed
After 3 months full vaccination may be required again
No need to worry, you are protected if within this period.
If you’ve had a recent exposure, book a consultation so I can guide you exactly what to do.
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The 90-day (3-month) observation rule for Anti-Rabies Vaccination (ARV) is a safety window where your body maintains a high level of protective antibodies. If a re-exposure (another dog bite) occurs within 90 days of your last dose (Day 28), you generally do not need a full fresh course of vaccines. The countdown for this 3-month protection period always begins from the date of the last injection of your completed 4-dose or 5-dose schedule, not the first day.
Next Steps
Peak Immunity: Your body reaches its maximum antibody concentration shortly after the final booster dose. Therefore, the 'safety shield' is calculated from the point the full course is completed.
WHO Guidelines: According to standard protocols, if a bite occurs within 3 months of a documented, completed PrEP or PEP course, only local wound care is usually required.
Re-exposure Protocol: If a bite happens after the 90-day window, you would typically only need two booster doses (on Day 0 and Day 3) rather than the full schedule again.
Health Tips
Keep Records: Always keep your vaccination card safe. The exact date of your last dose is the most critical piece of information for any future doctor.
Wound Care First: Regardless of the 90-day rule, if a dog bites you again, the first step is always washing the wound with soap and running water for 15 minutes.
Don't Worry: If you completed your 4-dose IDRV schedule correctly, you are well-protected for this 3-month window.
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The 90-day period is counted from the last dose (day 28) of the completed anti-rabies vaccine schedule, not from the first dose.
If a dog bite occurs within 90 days from the last dose, only booster doses (day 0 and day 3) are required.
If the bite occurs after 90 days, full post-exposure prophylaxis should be considered as per guidelines.
Next Steps
Please ensure immediate wound washing with soap and water for 15 minutes after any bite and consult a doctor promptly.
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