Signs of an allergic reaction may include itchy skin rash, shortness of breath and swelling of the face or tongue. • if your child has previously had an allergic reaction to any vaccine against diphtheria, tetanus, pertussis (whooping cough), hepatitis B or poliomyelitis diseases. • if your child experienced problems of the nervous system within 7 days after previous vaccination with a vaccine against pertussis (whooping cough) disease. • if your child has a severe infection with a high temperature (over 38°C).