Sentence:  In such diseases as cancer , <WSD>tuberculosis</WSD> , and heart disease , early diagnosis and treatment are so vital that the waste of time by the patient with Doctor Fraud 's cure-all gadget can prove fatal . 
Meaning of the word marked with <WSD> tags:  infection transmitted by inhalation or ingestion of tubercle bacilli and manifested in fever and small lesions (usually in the lungs but in various other parts of the body in acute stages)