Training the immune system
Vaccines contain weakened or inactivated parts of a particular germ, or a blueprint for making such a part. They prompt the immune system to respond — making antibodies and memory cells — without causing the disease. If the person later meets the real germ, the body can recognise and fight it quickly.
Protecting others
When enough people in a community are vaccinated, a disease spreads less easily. This helps protect people who can't be vaccinated, such as very young babies or some people with serious illnesses.
Schedules
National immunisation programmes set which vaccines are given at which ages. In Iran, childhood vaccines are given through health centres; ask your local health centre or clinician about the schedule for you or your child.
Side effects
Most side effects are mild and short-lived, such as a sore arm or a slight fever. Ask the vaccinating team what to expect and when to seek help.
Sources
- Vaccines and immunization: What is vaccination? — World Health Organization. Checked 2026-09-26.
- Vaccines — MedlinePlus — U.S. National Library of Medicine. Checked 2026-09-26.
Editorial update: 2026-09-26.
Medical disclaimer: this is a source-linked educational summary, not individual medical advice, diagnosis, prescription or interpretation of personal results. For severe or rapidly worsening symptoms, call 115.
Antopeloni — plain-language health education from public sources, part of the ZIBADIS network founded by Masoud Moghaddam.
