The infection is characterised by coughing fits, so severe that it becomes difficult to breathe, can lead to cracked ribs and pneumonia, and most importantly it can be fatal. Pertussis is transmitted through droplets from coughing and sneezing.

Whilst infants under the age of 6 months are most at risk, those who are unvaccinated or have deteriorating immunity from previous childhood vaccines are still vulnerable.

There are various symptoms, however commonly whooping cough will present as the common cold. Sever cases may develop into sudden attacks of aggressive coughing, with a characteristic ‘whoop’ upon gasping for breaths. In infants, apnoea (pauses in breathing) may be observed. Vomiting can also occur following a coughing fit.