Assessing Humoral and Cellular Immunity in a Rat Model of Staphylococcal Bacterial Pneumonia: Penilaian Imunitas Humoral Dan Seluler Pada Model Tikus Pneumonia Bakteri Staphylococcus. ijhsm 2025, 2 (2), 10.21070/ijhsm.v2i2.211.