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Introduction

When we think about vaccines, most of us picture babies getting injections at clinics. But the reality is that immunisation does not stop in childhood.

As teenagers grow, go to school, interact with more people, and become more independent, they are still at risk of infections. Staying up to date with vaccines is one of the easiest ways to protect yourself, your friends, and your future.

In Kenya, immunisation is guided by the Ministry of Health through the National Vaccines and Immunization Program (NVIP), which ensures vaccines are safe, effective, and available to protect against preventable diseases.

What is Immunisation

Immunisation simply means protecting your body against diseases using vaccines.

A vaccine works by training your immune system to recognize and fight harmful germs before they make you seriously sick.

Why Immunisation is Important for Teens

Even if you were vaccinated as a child, vaccines are still critical in your teenage years for several reasons.

Protection can reduce over time, so some vaccines need booster doses. Teenagers are also more exposed through school, social life, and travel. Some diseases, such as HPV, affect adolescents more directly. Immunisation also helps protect others, including younger siblings and older family members.

Vaccines have played a major role in reducing illnesses such as measles, polio, and tetanus in Kenya.

Types of Vaccines

Not all vaccines work the same way, but they all aim to protect you safely.

Live vaccines use a weakened version of a germ. Inactivated vaccines use a killed version of a germ. Toxoid vaccines protect against toxins produced by bacteria, such as tetanus. Subunit vaccines use only a small part of the germ.

You do not need to memorize these categories. What matters is that they help your body learn how to defend itself.

Vaccines Given to Children in Kenya

Kenya has a structured immunisation schedule under the NVIP and the Kenya Expanded Programme on Immunization.

Some key vaccines given in childhood include BCG for tuberculosis at birth, polio vaccines to prevent paralysis, the pentavalent vaccine which protects against five diseases including diphtheria, tetanus, and hepatitis B, pneumococcal vaccine for pneumonia, rotavirus vaccine for severe diarrhoea, and the measles rubella vaccine. In some regions, the yellow fever vaccine is also provided.

These vaccines are given from birth up to about 18 months according to the Ministry of Health schedule.

Important Vaccines for Teenagers

As a teenager, there are specific vaccines that may be recommended depending on your age, health history, and previous vaccinations.

The HPV vaccine protects against cervical cancer and other related cancers and is routinely offered to adolescents in Kenya, especially girls, often through school-based programs.

A tetanus booster may be needed because protection from childhood vaccines can reduce over time. It is especially important in case of injuries or in certain situations later in life.

A measles and rubella vaccine dose may be required if earlier doses were missed, as these are part of Kenya’s routine childhood immunisation schedule.

Hepatitis B vaccination protects the liver from infection and is usually given in early childhood. Teenagers may only need it if they were not fully vaccinated before or are at higher risk.

The influenza vaccine may be recommended in certain cases, particularly for teenagers with underlying health conditions or higher risk of complications.

COVID-19 vaccines may also be advised depending on current national guidelines and individual risk factors.

Some of these vaccines are delivered through school programs or national campaigns that target children and teenagers.

A Quick Reality Check

In Kenya, many children receive vaccines, but some miss doses or do not complete the full schedule, which can leave them vulnerable.

Teenage years are a good time to check your vaccination history, ask questions, and take responsibility for your health.

Important Reminder

Not every vaccine is suitable for everyone at the same time.

Always consult a doctor or a qualified healthcare provider before getting vaccinated. They will consider your age, medical history, and previous vaccinations before making recommendations.

Final Thoughts

Immunisation is a lifelong part of staying healthy.

As a teenager, staying informed and protected is an important step toward taking control of your health and building a strong future.