Deadly Parasites
S1, E7: Since 1976, when 180 war veterans were hospitalised in Philadelphia with pneumonia-like symptoms, the disease has been resurfacing every few years, leaving doctors baffled.

S1, E7: Since 1976, when 180 war veterans were hospitalised in Philadelphia with pneumonia-like symptoms, the disease has been resurfacing every few years, leaving doctors baffled.