What should you know about diphtheria live vaccine?

The vaccine cannot cause diphtheria because it does not contain living diphtheria bacteria. It helps the immune system recognise and neutralise the toxin made by the bacteria. Protection is built through the recommended immunisation schedule, which may include a primary series and later booster doses. Vaccination reduces the chance of severe toxin-related illness, but it does not replace medical assessment after a possible exposure.

Diphtheria can affect the throat, nose, skin, or other tissues. A sore throat with marked weakness, fever, swollen neck, or a grey coating needs prompt attention; see the guidance on [Sore Throat].

Check your immunisation record and arrange a clinical review if doses are missing, uncertain, or overdue. A clinician can advise on catch-up vaccination, boosters, and whether close contacts need assessment. If diphtheria is suspected, avoid close contact, do not share cups or utensils, and contact a healthcare service before arriving so infection-control steps can be arranged. Treatment may include antitoxin and [Antibiotic Treatment], guided by a clinician.

Seek urgent medical care for difficulty breathing or swallowing, drooling, a rapidly worsening throat or neck swelling, bluish lips, severe weakness, or confusion. Contact a clinician promptly after close contact with a person diagnosed with diphtheria, even if you feel well. Do not try to scrape a throat coating away. For prevention planning, read about [Childhood Immunisation].

Ask which diphtheria-containing vaccine is appropriate for your age, whether your record shows adequate protection, and whether a booster or catch-up plan is needed. If you were exposed, ask whether testing, preventive antibiotics, or temporary separation from others is advised.