It's a vaccination-agnostic comment, about how the complexity of immunological processes make the claim that any drug development involving them is "likely" a h

It's a vaccination-agnostic comment, about how the complexity of immunological processes make the claim that any drug development involving them is "likely" a hilariously reductive statement. As an analogy, that's kind of like saying the Wright Flyer flew, so smart money is on the Wright Company being successful. (Except if aerodynamics were about 1000x more complex) Predicting anything in drug discovery from a financial standpoint is laughably imprecise.