What is Antibody-dependent enhancement? I believe today GlaxoSmithKline corporation (which bought out these other companies that was forced out of business by the FDA(and world equivalence)) calls it "Plasma therapy"
The concept which has never worked is that the antiviral proteins (i.e., the antibodies) bind to antibody Fc receptors (types of white blood cells such as macrophages.) The idea was this antibody treatment would help the white blood cells fight the disease.
The point is this treatment has never worked and the result is the lungs change forever after this treatment which the those infected by that type of disease (IE SARS in this case) is prone to build ups in the airways in the lungs which often get infected.
I personally believe the National Institutes of Health knew about this Proinflammatory Pulmonary Response from the SARS these failed vaccine along with the spike in "flu" related cases and reacted which created what seems like an over reaction. (For the spike in cases watch Tracy Beanz video called
FLU SEASON STARTED EARLY THIS YEAR. OR DID IT?
Wikapeda has an OK explanation on Antibody-dependent enhancement though they have the part where a minor infection turns life threatening slightly off.
It actually creates a buildup in the lungs where the patent (victim) can't get enough oxygen and later they get the bad infection. This report gets into more details on this
Acute Respiratory Syndrome Coronavirus Vaccine
Thank you!