Among the incorrectly vaccinated patients, 25.7% were protected against diphtheria, 79.8% against tetanus, 43.7% had an anti-PT titer ≥ 5 IU/mL, 6.6% had titers indicative of infection in the past few years and 1.7% titers indicative of infection in the past few months. The gene discussed is F2; the disease is diphtheria.