Why prevention is a year-round job for UK cats

British weather might be mild, but it does little to slow down parasites and viruses. Fleas thrive indoors all year, slugs and snails emerge after rain, and mice and voles visit gardens and outbuildings. Whether your cat is a seasoned hunter or an indoor companion, keeping vaccinations and worming up to date protects their health and your family, because some cat parasites can affect humans. The UK schedule is straightforward once you know what you are dealing with.

The core vaccinations: what they protect against

In the UK, vets routinely vaccinate against three serious diseases. These core vaccines are recommended for every cat, even those who never leave the house.

• Cat flu — caused by feline herpesvirus and calicivirus. It spreads through sneezing, shared bowls, and close contact. Symptoms include runny eyes and nose, sneezing, mouth ulcers, and loss of appetite. Kittens and older cats can become very unwell, and some become lifelong carriers who relapse during stress.
• Feline infectious enteritis — also known as feline panleukopenia or parvovirus. This hardy virus survives in the environment for months. It attacks the gut and bone marrow, causing severe vomiting, diarrhoea, and a dangerous drop in white blood cells. It is often fatal in kittens.
• Feline leukaemia virus (FeLV) — suppresses the immune system and can lead to cancer. It spreads through close contact, saliva, and shared litter trays. Outdoor cats who fight or mate are most at risk, but any cat can be exposed.

Some vaccines also include chlamydiosis or bordetella, which are more common in multi-cat households, breeding colonies, or rescue centres. Your vet will advise whether these extra coverages suit your cat.

Kitten and adult vaccination schedules

Kittens usually receive their first vaccination at eight to nine weeks old, followed by a second dose at twelve weeks. The second dose must not be given before twelve weeks, because antibodies from their mother's milk can block the vaccine. If your kitten is older than twelve weeks when they start, they may still need two doses, three to four weeks apart. The leukaemia vaccine often requires two doses, usually from nine weeks of age.

After the kitten course, a booster at twelve months is essential. This tops up immunity when initial protection starts to fade. After that, core vaccines are often given every one to three years, depending on the product and your vet's advice. The leukaemia vaccine is usually annual. Indoor cats still need core vaccinations, because viruses can travel indoors on shoes, clothing, or hands. Leukaemia risk is lower for indoor cats, so discuss it with your vet.

Rescue cats with an unknown history should start a full course. Older cats also benefit from boosters, though your vet may adjust the timing or type if your cat has kidney disease, cancer, or another ongoing condition.

Worming: the hidden hitchhikers in your cat's life

Worms are masters of disguise. A cat with a mild infestation may look healthy, but worms can still cause weight loss, a dull coat, vomiting, diarrhoea, and a pot-belly in kittens. In the UK, three types of worm matter most.

• Roundworm — Toxocara cati. Kittens catch it from their mother's milk, and adults pick it up from contaminated soil, prey, or grooming. Heavy infestations can block the gut. Roundworm eggs can infect humans, especially children, causing toxocariasis.
• Tapeworm — Dipylidium caninum comes from fleas, while Taenia species come from eating rodents. You may spot rice-like segments around your cat's bottom or in their bedding. Tapeworm is unpleasant and can affect your cat's condition.
• Lungworm — Aelurostrongylus abstrusus. Cats get it by eating slugs, snails, or infected prey such as mice. It causes coughing, wheezing, and breathing difficulty, and can be mistaken for asthma. It is more common in cats who hunt or roam outdoors.

Because worms rarely announce themselves, regular treatment is about prevention, not just cure. It also reduces the risk to your family and other pets.

Building a practical worming and vaccination routine

Kittens need worming every two weeks until twelve weeks old, then monthly until six months. Adult cats should be wormed at least every three months. If your cat hunts, eats raw meat, or spends a lot of time outdoors, monthly worming is safer. Pregnant queens should be treated before mating and again after giving birth, using a vet-recommended product for pregnancy and nursing.

Always weigh your cat before worming, and use the correct dose. Guessing can lead to underdosing, which leaves worms alive, or overdosing, which can cause side effects. Worming comes as spot-on treatments, tablets, or injections. Tablets can be hidden in food or given with a pill popper, while spot-ons are applied to the skin at the back of the neck. Never use a dog worming product on a cat, as some ingredients are toxic to cats.

Flea control goes hand in hand with worming, because fleas carry tapeworm. Keep a written record of every vaccination and worming treatment, and set a reminder on your phone or calendar. If you are unsure about timing, ask your vet for a personalised schedule. Titre testing can check antibody levels for some core vaccines, but it does not replace worming. Mild side effects such as sleepiness, soreness, or a small amount of vomiting can happen, but call your vet if you are worried.

A few minutes each month is all it takes to keep your cat protected. With a clear routine, you can enjoy the cuddles, the purrs, and the muddy paw prints, knowing you have done right by your feline friend.