The protective efficacy of chlamydial protease-like activity factor vaccination is dependent upon CD4+ T cells.
Murphey C, Murthy AK, Meier PA, Neal Guentzel M, Zhong G, Arulanandam BP. The protective efficacy of chlamydial protease-like activity factor vaccination is dependent upon CD4+ T cells. Cell Immunol. 2006 Aug; 242(2):110-7.