3.4. After Challenge Infection with Serovar E of C. trachomatis, s.c. Vaccination with c-di-AMP-Adjuvanted 5cVAC Does Not Lead to Relevant Protection in Regard to Body Weight, Clinical Score, Bacterial Load, the Levels of the Granulocyte Marker MPO, TNF-α or IFN-γ in Lung Homogenate. The gene discussed is MPO; the disease is infection.