Vaccinations are one of the most important things you can do for your new kitten. They protect against serious, often fatal diseases that are preventable with a simple series of shots during the first few months of life. Understanding which vaccines your kitten needs and when they need them helps you stay on schedule and gives your cat the strongest possible start.
This guide covers every vaccine your kitten should receive, the complete timeline, what to expect at each visit, and answers to the most common questions new cat owners have about the vaccination process.
Why Vaccinations Matter
Kittens are born with some immunity passed from their mother through colostrum (the first milk). This maternal immunity provides temporary protection during the earliest weeks of life, but it fades between 6 and 16 weeks of age. During this window, kittens become increasingly vulnerable to infectious diseases.
Vaccinations work by exposing the immune system to a harmless version of a pathogen, teaching it to recognize and fight the real thing. The reason kittens need multiple doses is that maternal antibodies can interfere with the vaccine’s ability to trigger an immune response. By giving boosters every 3 to 4 weeks, we ensure that at least one dose takes full effect after maternal immunity has waned.
Skipping or delaying vaccines leaves your kitten unprotected during one of the most vulnerable periods of their life.
Core Vaccines
Core vaccines are recommended for every kitten, regardless of lifestyle or living situation. The diseases they protect against are widespread, highly contagious, and often fatal.
FVRCP (Feline Viral Rhinotracheitis, Calicivirus, and Panleukopenia)
This combination vaccine protects against three diseases in a single shot:
Feline Viral Rhinotracheitis (FVR) — Caused by feline herpesvirus-1, this is one of the most common upper respiratory infections in cats. It causes sneezing, nasal discharge, eye ulcers, and fever. Once infected, cats carry the virus for life, with periodic flare-ups during stress.
Feline Calicivirus (FCV) — Another upper respiratory pathogen that causes mouth ulcers, nasal congestion, and pneumonia. Some strains can be particularly severe, especially in kittens.
Feline Panleukopenia (FPV) — Also called feline distemper, this is a highly contagious and often fatal virus that attacks rapidly dividing cells in the bone marrow, intestines, and developing fetuses. The mortality rate in unvaccinated kittens is extremely high — up to 90% in young kittens. The virus is incredibly resilient and can survive in the environment for over a year.
Rabies
Rabies vaccination is legally required in most U.S. states, regardless of whether your cat goes outdoors. Rabies is 100% fatal once symptoms appear — in cats, dogs, and humans. There is no cure. Vaccination is the only protection.
Even indoor cats can encounter rabid bats that enter homes or escape outside accidentally. Rabies vaccination protects your cat and provides legal protection for you if your cat ever bites someone.
Non-Core Vaccines
Non-core vaccines are recommended based on your kitten’s specific risk factors, including whether they will go outdoors, live with other cats, or be exposed to unvaccinated animals.
Feline Leukemia Virus (FeLV)
FeLV is a retrovirus transmitted through close contact — mutual grooming, shared food bowls, or bite wounds. It suppresses the immune system and is a leading cause of cancer in cats.
The American Association of Feline Practitioners (AAFP) recommends FeLV vaccination for all kittens, even those planned as indoor-only cats, because their future lifestyle may change. Kittens should receive two doses, 3 to 4 weeks apart. Whether to continue boosting into adulthood depends on your cat’s risk level — discuss this with your vet.
A Note on FIV (Feline Immunodeficiency Virus)
There is currently no widely available FIV vaccine in the U.S. (the previous vaccine was discontinued). FIV is primarily transmitted through deep bite wounds, making it most common in outdoor unneutered male cats who fight. The best prevention is keeping your cat indoors and spaying/neutering.
The Complete Kitten Vaccination Schedule
| Age | Vaccines | Notes |
|---|---|---|
| 6-8 weeks | FVRCP (1st dose) | First vet visit; deworming usually starts here too |
| 10-12 weeks | FVRCP (2nd dose), FeLV (1st dose) | FeLV testing should happen before FeLV vaccination |
| 14-16 weeks | FVRCP (3rd dose), FeLV (2nd dose), Rabies | Rabies is typically given at 16 weeks; some areas allow it earlier |
| 1 year | FVRCP booster, Rabies booster | Then every 1-3 years depending on vaccine type |
Your vet may adjust this schedule slightly based on your kitten’s health, the specific vaccines used, and local disease prevalence. The important thing is completing the full series — a single dose does not provide reliable protection.
What to Expect at Vaccination Appointments
Knowing what happens during a vaccination visit helps you prepare and keeps anxiety (yours and your kitten’s) to a minimum.
Before the appointment: Bring any medical records you received from the breeder or shelter. If this is your first visit, the vet will do a complete physical exam before vaccinating.
During the appointment: The injection itself takes seconds. Most kittens barely react — a tiny prick, maybe a small flinch, and it is over. Your vet will likely check your kitten’s weight, listen to their heart, examine their eyes and ears, and feel their abdomen.
After the appointment: Most kittens are completely normal afterward. Some may be slightly sleepy or have a mild decrease in appetite for 12 to 24 hours. A small, firm lump at the injection site is normal and should resolve within 2 to 4 weeks.
When to Call Your Vet
Contact your veterinarian if your kitten experiences any of the following after vaccination:
- Vomiting or diarrhea that persists beyond 24 hours
- Facial swelling or hives (allergic reaction — seek care immediately)
- Difficulty breathing (allergic reaction — seek emergency care)
- Injection site lump that grows larger or does not resolve within 4 weeks
- Persistent lethargy lasting more than 48 hours
- Fever that lasts more than 24 hours
Serious vaccine reactions are rare, but they do happen. The benefits of vaccination vastly outweigh the risks.
FIV/FeLV Testing
Before starting the FeLV vaccine series, your vet should test your kitten for both FIV and FeLV. This is typically done with a simple blood test called a SNAP test, which provides results in about 10 minutes.
Testing matters because:
- A kitten already infected with FeLV will not benefit from the vaccine
- Knowing your kitten’s FIV/FeLV status is critical for their long-term health management
- If you have other cats at home, you need to know whether your new kitten could transmit these viruses
Kittens under 6 months who test positive for FeLV should be retested at 6 months, as some young kittens clear the virus on their own.
Indoor Cats Still Need Vaccines
One of the most common misconceptions is that indoor cats do not need vaccinations. Here is why that is not true:
- Rabies is legally required in most areas, regardless of indoor/outdoor status
- Cats escape. Even the most carefully managed indoor cat can slip through an open door or window
- Bats enter homes. Rabid bats are the most common source of rabies exposure for indoor cats
- New cats enter the household. If you adopt another cat in the future, an unvaccinated resident cat is at risk
- Veterinary visits and boarding expose your cat to environments where pathogens may be present
- Some viruses are incredibly persistent. Panleukopenia virus can be carried into your home on shoes and clothing
The risk to indoor cats is lower than outdoor cats, but it is not zero. Core vaccines provide a safety net that costs very little relative to the diseases they prevent.
Keeping Records
Keep a copy of your kitten’s vaccination records in a safe place. You will need them for:
- Boarding and grooming facilities
- Moving to a new state (rabies proof is often required)
- Rental applications (many landlords require vaccination records)
- Veterinary emergencies at clinics other than your primary vet
Most veterinary clinics are happy to provide printed records or digital copies for your files.
For a similar guide covering puppies, see our puppy vaccination schedule.
Veterinary Disclaimer: This article is for informational purposes only and does not constitute veterinary advice. Vaccination protocols may vary based on your kitten’s health, risk factors, and regional disease prevalence. Always follow the vaccination schedule recommended by your licensed veterinarian.