CollarPassA rabies titer test measures antibodies against rabies virus in a blood sample. For international pet travel, the destination decides whether testing is required, which laboratories it accepts, when blood can be collected, and how long you must wait afterward. A passing report alone does not make a pet ready to fly.
The biggest scheduling trap is treating every destination as having the same waiting period. Japan's Animal Quarantine Service (AQS) requires 180 days from sampling to arrival in the ordinary non-designated-region process. Great Britain describes a three-month wait for pets from unlisted countries. Current European Union (EU) guidance instead specifies at least 90 days from sampling to health certificate issue. These are different rules, not alternative wording for one deadline.
This guide covers dogs and cats, plus ferrets where the EU and Great Britain rules apply. Ask your veterinarian about medical decisions; CollarPass does not diagnose immunity, arrange testing, or issue official documents.
Sources: European Commission, GOV.UK, and Japan AQS — checked November 2, 2026.
Quick answer
- Establish the destination's classification of your departure country or region first.
- Verify the microchip and qualifying vaccination history before sampling.
- Choose a laboratory accepted by that destination, not merely a nearby laboratory.
- Count any waiting period from the event the official rule specifies.
- Keep vaccinations current and check the report's destination-specific validity.
Sources: EU entry guidance, Japan AQS, and CDC serology requirements — checked November 2, 2026.
Which routes need testing?
Do not use one country's “low-risk” list for another country's entry rules. The EU, Great Britain, Japan, China, and United States use different categories and exceptions. The U.S. mainland and Hawaii can also be treated differently.
For EU entry, testing generally applies when the origin is outside the exempt-country lists. Great Britain requires testing for pets arriving from countries outside the EU that are not listed. Japan requires it for dogs and cats using the non-designated-region process, including ordinary U.S.-mainland departures. China's no-quarantine pathway from the U.S. mainland requires antibody evidence. The Centers for Disease Control and Prevention (CDC) uses serology in the foreign-vaccinated, high-risk-dog pathway; this is not a blanket testing requirement for every dog entering the United States.
Use the relevant planned destination overview—Japan, China, Great Britain, France, or United States—before choosing a laboratory appointment.
Sources: European Commission, GOV.UK, Japan AQS, APHIS China, and CDC — checked November 2, 2026.
What do FAVN and the result mean?
Fluorescent Antibody Virus Neutralization (FAVN) is a laboratory method used for rabies antibody testing. A travel report may be called a FAVN report or a rabies serology report. Do not choose a test by its informal name alone: the destination must accept the laboratory, method, and documentation.
The official pathways compared here use a qualifying result of at least 0.5 international units per milliliter (IU/mL). That number does not replace vaccination requirements or override the waiting period. Ask the laboratory which travel assay it will perform, what sample and paperwork the veterinarian must send, and whether the report is suitable for every destination on your itinerary.
Sources: Kansas State University: FAVN, APHIS China, EU testing criteria, Japan AQS, and CDC — checked November 2, 2026.
Get the chip and vaccine sequence right
For ordinary EU entry, the rabies vaccination must be linked to the pet's identification; the vaccination date must not precede microchip implantation or the relevant documented reading. Following a primary vaccination, blood is collected at least 30 days later. Current EU guidance also addresses collection within an existing valid vaccination series, so ask the certifying veterinarian which provision fits your record.
Japan's non-designated-region pathway requires two qualifying rabies vaccinations after microchipping. The first must be given at 91 days of age or older; the second is at least 30 days after the first and within its immunity period. Blood may be collected on the second vaccination day or later, while vaccination remains valid. This differs from simply adding 30 days after the most recent injection.
Sources: European Commission and Japan AQS, Steps 1–3 — checked November 2, 2026.
Compare the waiting periods and report validity
| Pathway | Sampling and waiting rule | Report validity or continuation |
|---|---|---|
| EU, testing-required origin | Primary-vaccination sampling interval normally at least 30 days; sample at least 90 days before health certificate issue | No repeat test if subsequent vaccination coverage remains uninterrupted, subject to the applicable conditions |
| Great Britain, unlisted origin | Sample at least 30 days after vaccination; GOV.UK says wait three months from sampling before travel | Continues while rabies vaccination stays up to date |
| Japan, non-designated region | Sample after the second qualifying vaccination, including the same day; arrival after the required 180-day wait | Two years from sampling, with vaccination valid at arrival |
| China, U.S.-mainland no-quarantine route | Sample on or after the second lifetime vaccination; obtain the accepted result before travel | Up to one year from sampling |
| CDC, foreign-vaccinated dog with high-risk history | Sample at least 30 days after the initial valid vaccination and at least 28 days before import | Lifetime if vaccination never lapses and the laboratory remains approved |
Sources: European Commission, GOV.UK, Japan AQS, APHIS China, and CDC approved labs — checked November 2, 2026.
For Great Britain, official sources differ; check both. GOV.UK's public guidance describes waiting three months before travel, while the GB certificate model, section II.3.1, measures the interval to certificate issue, with additional wording in its notes. Ask the issuing authority to confirm the acceptable signing date; do not choose the more convenient interpretation yourself.
Sources: GOV.UK guidance and certificate model linked above — checked November 2, 2026.
For China, official sources differ; check both. APHIS states at least 0.5 IU/mL and up to one year from sampling. Shanghai's government guidance uses “above 0.5” in its overview and describes continuing report validity after timely revaccination in its questions and answers. Confirm acceptance with destination customs before relying on an exact-threshold result or an older report.
Sources: APHIS and Shanghai guidance linked above — checked November 2, 2026.
Japan: count from the successful sample, not the report date
Japan counts sampling as day zero for its 180-day requirement. Laboratory processing time is therefore inside that interval, but you still need a successful result. If a sample fails and a later sample passes, do not continue using the earlier failed sample as the basis for your plan.
Advance notification is another task: notify AQS at the intended arrival port at least 40 days before arrival. Completing the test does not submit that notification. AQS also describes circumstances in which an updated test need not restart the full wait when the previous qualifying process and continuous vaccination conditions are met; have AQS check the actual records before relying on that exception.
Source: Japan AQS, Steps 3–5 — checked November 2, 2026.
Choose an approved laboratory before drawing blood
For EU entry, use the designated-laboratory lists linked from the European Commission's guidance. Great Britain directs owners to EU-approved laboratories. Japan maintains its own designated list, and CDC maintains a separate approved list. Approval for one system does not establish approval for another.
For a U.S. pet entering China, APHIS lists accepted laboratories including Kansas State University's rabies laboratory and several other named facilities. Confirm that the chosen facility accepts civilian pet samples and the required method. Ask your veterinarian to arrange collection, labeling, submission, and shipping according to that laboratory's current instructions.
Sources: EU laboratory links, GOV.UK, Japan laboratory list, CDC list, and APHIS China — checked November 2, 2026.
Common failures—and what to do next
A result below the threshold requires veterinary advice and another qualifying result; never edit or reinterpret the report. Other problems are administrative: sampling too early, using an unaccepted laboratory, entering the wrong chip number, or letting vaccinations lapse. A high antibody number does not cure those defects.
Before booking non-refundable travel, check the report against the pet's records: chip number, sampling date, laboratory, result, and any required original or certified copy. Ask the laboratory about current turnaround and fees; there is no single worldwide processing time or price. CDC recommends discussing collection at least 60 days before travel, but that recommendation does not shorten its mandatory timing rules.
Sources: Japan AQS, CDC, and APHIS China — checked November 2, 2026.
Next, schedule the international health certificate and work through the international pet travel checklist. A valid titer report is one part of the record, not the final travel authorization.
