Severe acute respiratory syndrome (SARS) is a contagious lung infection which causes bleeding in the lungs and severe breathing difficulty. It can be fatal.
Addison's disease of the adrenal glands impairs glucocorticoid, mineralocorticoid and sex steroid production, causing muscle weakness and other symptoms.
Osteomyelitis is a bacterial or fungal bone infection which results in pus production that reduces blood flow to the bone. Antibiotic treatment is needed.