# Is diphtheria vaccination necessary for adults? Canonical page: https://clinicsjo.com/en/faq/is-diphtheria-vaccination-necessary-for-adults Language: en Category: infectious Publisher: ClinicsJo Published: 2026-09-13T17:52:52.856Z Content updated: 2026-09-13T17:52:52.856Z Translation (ar): https://clinicsjo.com/ar/faq/is-diphtheria-vaccination-necessary-for-adults Yes, diphtheria vaccination is necessary for adults to maintain protection against this serious bacterial disease. The protection provided by the diphtheria vaccine does not last a lifetime; therefore, adults are recommended to receive a booster dose every 10 years. This measure helps prevent infection, which can affect the nose and throat and cause serious complications. ## Why do adults need booster doses? Although routine childhood vaccinations have made diphtheria rare in many parts of the world, the protection provided by these vaccines wanes over time [\[3\]](). Therefore, booster doses are necessary for adults to maintain an adequate level of immunity against the bacteria that cause diphtheria. These doses help renew protection and reduce the risk of contracting the disease, especially when there is potential exposure to the infection [\[1\]](). Diphtheria bacteria can spread via respiratory droplets from coughing or sneezing by an infected person, or even from a person who carries the bacteria without showing symptoms [\[3\]](). It can also be transmitted through contact with contaminated surfaces [\[1\]](). Therefore, keeping vaccinations up to date reduces the risk of contracting and spreading the disease. ## When should adults receive the booster dose? It is recommended that adults receive a diphtheria booster dose every 10 years [\[1\]](). This dose is usually given as part of the tetanus and diphtheria (Td) vaccine or the tetanus, diphtheria, and pertussis (Tdap) vaccine [\[3\]](). It is important to review your vaccination record and talk to your healthcare provider to determine if you need a booster dose. If you have been in contact with someone infected with diphtheria, you must contact your healthcare provider immediately. The doctor may recommend a booster dose if your vaccinations are not up to date, and they may also prescribe preventative antibiotics [\[3\]](). ## What happens if you are not vaccinated? Diphtheria is a serious disease caused by toxins produced by certain strains of the *Corynebacterium diphtheriae* bacteria. These toxins can kill healthy tissues and cause serious health problems [\[2\]](). Common symptoms include a sore throat, swollen glands in the neck, fever, and weakness [\[1\]](). In severe cases, a hard gray or black membrane can form in the throat, which may block the airway [\[3\]](). The toxins can spread through the bloodstream to damage other organs such as the heart, brain, and kidneys, potentially leading to serious complications like myocarditis or temporary paralysis [\[3\]](). Therefore, prevention through vaccination is crucial to avoid these risks. ## Practical Tips - Regularly review your vaccination record to ensure you are up to date on your diphtheria booster doses. - Talk to your doctor about the vaccines recommended for you based on your age and health history. - If you are planning to travel to areas where diphtheria may be more common, ensure your vaccinations are up to date before traveling [\[2\]](). - If diphtheria is suspected, treatment with antibiotics and antitoxins must be started immediately, even before laboratory test results are confirmed [\[2\]](). For more information, see our article on [diphtheria bacterial infection (Arabic)](). ## Medical references - [Diphtheria]() - [About Diphtheria]() - [Diphtheria]() General health education; not a substitute for individualized clinical assessment. Citation URL: https://clinicsjo.com/en/faq/is-diphtheria-vaccination-necessary-for-adults#answer