Pneumonia - From the sputum of the patient.

Explanation: Pneumonia is caused by Streptococcus pneumoniae & Haemophilus influenzae. It is a serious disease of the lungs. Lymph and mucus collect in the alveoli and bronchioles of the lungs so lungs do not get sufficient air. No such vaccine is available. However, Penicillin, Streptomycin and Ampicillin is used.