Kitten Vaccination Schedule: Core Shots by Age
Veterinary references checked with PetHealth+ · Last reviewed June 2026
By Kaiser Khan , Founder Veterinary references checked with PetHealth+ ( process ) Last reviewed Cite this page How we research & review
Kittens usually start vaccines at 8–9 weeks with boosters to 16 weeks. Core vaccines cover cat flu and panleukopenia; rabies depends on local law.
Core vaccines
Feline herpesvirus, calicivirus, and panleukopenia (FVRCP).
Indoor cats
Still need core vaccines — cat flu can enter on clothing and shoes.
Spay/neuter timing
Often coordinated with vaccine visits around 4–6 months.
Related: How to care for a kitten · Neutering a cat
Frequently asked questions
When can kittens go outside?
After completing primary vaccination course — usually from 16 weeks.
Do indoor kittens need rabies vaccine?
Depends on local regulations — many areas require it.
Can vaccines make kittens sleepy?
Mild lethargy for a day is common — persistent illness needs a vet call.
How often are adult boosters?
Every 1–3 years depending on vaccine type and vet protocol.