What should you know about the pertussis vaccine?

Pertussis, also called whooping cough, is a bacterial respiratory infection that can cause prolonged coughing bouts. Vaccination prepares immune defences before exposure. Protection can lessen over time, which is why schedules may include childhood doses and later boosters. The vaccine cannot treat an existing infection and does not prevent every cough caused by viruses, asthma, reflux, or other conditions.

Some people develop a sore arm, tiredness, headache, or a mild temperature after vaccination. These effects generally settle without specific treatment. Read about [Childhood Immunisation](/treatments/preventive-care-and-vaccination/childhood-immunisation/) if you are checking a child’s schedule.

Ask a clinic to review your record, age, pregnancy status, medical conditions, allergies, and any previous vaccine reaction. Mention medicines that affect immunity. Remain at the clinic for the observation period they recommend, then keep the injection site clean and move the arm gently if it is sore. If you develop a persistent cough, arrange assessment rather than assuming it is a vaccine effect; [Whooping Cough](/conditions/whooping-cough/) may require testing and [Antibiotic Treatment](/treatments/medical-management/antibiotic-treatment/) advice.

Call emergency services for difficulty breathing, swelling of the mouth or throat, collapse, or a rapidly spreading allergic reaction after vaccination. Seek prompt clinical advice for a cough with vomiting, breathing pauses, chest pain, or marked weakness. A [Fever](/symptoms/fever/) with a child’s poor feeding or unusual sleepiness also deserves prompt assessment.

Am I due a pertussis-containing vaccine? Which reactions are expected? Do I need a booster because of pregnancy, work, or close contact with a baby? What should I do if I develop a cough afterward?