Complete cat vaccination guide: 3-in-1 vs 5-in-1 vaccines, kitten to adult schedules, side effects, costs, and why indoor cats still need vaccines.
Vaccination is one of the first things to arrange when welcoming a new cat. Even fully indoor cats face infection risks that are not zero. Understanding the types, schedule, costs, and precautions for feline vaccines is essential.
Types of Vaccines
Cat vaccines are broadly divided into core vaccines and non-core vaccines.
Core Vaccines (Recommended for All Cats)
These protect against highly contagious and potentially severe infections.
- Feline Panleukopenia (FPV/Feline Parvo): Causes severe vomiting, diarrhea, and dramatic white blood cell drop. Extremely high fatality rate in kittens
- Feline Herpesvirus (FHV-1): The common "cat flu." Causes sneezing, nasal discharge, and conjunctivitis. Once infected, the virus remains latent and can reactivate
- Feline Calicivirus (FCV): Causes oral ulcers, fever, and sneezing. Severe systemic forms can cause multi-organ failure
Non-Core Vaccines (Based on Lifestyle)
Considered based on the cat's environment and lifestyle.
- Feline Leukemia Virus (FeLV): Causes immunosuppression, anemia, and lymphoma. Strongly recommended for outdoor cats and multi-cat households
- Feline Chlamydia (Chlamydophila felis): Primarily causes conjunctivitis. Spreads easily in multi-cat environments
- Feline Immunodeficiency Virus (FIV): So-called "feline AIDS." Transmitted through bite wounds. Consider for outdoor cats (some vaccines available in Japan)
Combination Vaccine Types
Common combination vaccines used in Japan:
- 3-way: Panleukopenia + Herpesvirus + Calicivirus. The basic vaccine recommended for all cats
- 4-way: 3-way + Feline Leukemia Virus
- 5-way: 3-way + Feline Leukemia Virus + Chlamydia. Recommended for outdoor cats and multi-cat households
Vaccination Schedule
Kitten Schedule
Kittens need multiple doses because maternal antibodies gradually decline.
- 1st dose (around 8 weeks): Often administered by the breeder
- 2nd dose (around 12 weeks): Given at the veterinary clinic after adoption
- 3rd dose (around 16 weeks): A final dose for solid immunity (at veterinary discretion)
Important: Until vaccination is complete, minimize contact with other cats.
Adult Cat Schedule
- **Booster 1 year** after completing the kitten series
- Subsequent boosters every **1–3 years**. WSAVA guidelines recommend 3-year intervals for core vaccines
- Non-core vaccines (e.g., feline leukemia) are often recommended **annually**
- Antibody titer testing to assess vaccination needs is also becoming more common
Why Indoor-Only Cats Still Need Vaccines
Thinking "my cat never goes outside" can be dangerous. Consider these risks:
- Owners tracking in pathogens: Viruses can hitchhike on shoes and clothing
- Escape during disasters: Windows and doors can't be guaranteed escape-proof at all times
- Veterinary clinic exposure: Contact with infected cats in the waiting room is possible
- Adding a new cat: The newcomer may carry pathogens
At minimum, the 3-way combination vaccine is recommended even for fully indoor cats.
Estimated Costs
- 3-way combination: 3,000–6,000 yen/dose
- 4-way combination: 5,000–7,000 yen/dose
- 5-way combination: 6,000–8,000 yen/dose
- Antibody titer test: 5,000–10,000 yen
The kitten series (2–3 doses) costs roughly 6,000–24,000 yen total, while annual adult costs run approximately 3,000–8,000 yen.
Side Effects and Precautions
The following reactions may occur after vaccination:
- Mild reactions (resolve in 1–2 days): Swelling at the injection site, slight fever, temporary decrease in appetite or activity
- Severe reactions (seek immediate care): Facial swelling, vomiting, difficulty breathing, lethargy
- Feline Injection-Site Sarcoma (FISS): Very rare, but a malignant tumor can develop at the injection site. Precautions include rotating injection sites and using the hind legs
Post-vaccination guidelines:
- Wait 30 minutes to 1 hour at or near the veterinary clinic
- Avoid bathing and vigorous play on vaccination day
- Keep activity light for 2–3 days and monitor appetite, energy, and elimination
- If a lump persists at the injection site for more than 3 months, schedule a follow-up visit
Find Healthy Cats on Bri-Choku
Trusted breeders administer the first vaccination before handover and provide vaccination certificates. The Bri-Choku cat category features many breeders who list vaccination histories. Confirm the follow-up vaccination schedule with your breeder before adoption.
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