Montagnier said that when he took the blood of patients with autism—and diluted it to the point that not a single molecule of the original blood remained—he could detect electromagnetic waves indicating the presence of bacterial DNA. Autism, it appeared, was a bacterial infection. And it wasn’t just autism that was caused by bacteria. Alzheimer’s disease, Parkinson’s disease, multiple sclerosis, rheumatoid arthritis, and chronic fatigue syndrome were bacterial infections, too.