Your response reduces to, "You can't know for sure, so I know for sure." Since lots of people get pneumonia without getting a flu shot first, and since we know what non-attenuated flu shots are, it's reasonable to assume that the flu shot didn't cause the pneumonia.
Pneumonia is frequently not brought on by a single virus or bacterium, but rather is secondary to something else going on. It is far too simplistic and entirely untrue to say that someone could never develop pneumonia as an indirect result of a bad response to a vaccine.
Pneumonia isn’t an autoimmune response. It is viral or bacterial, neither of which would be in the normal flu vaccine.
Your response reduces to, "You can't know for sure, so I know for sure." Since lots of people get pneumonia without getting a flu shot first, and since we know what non-attenuated flu shots are, it's reasonable to assume that the flu shot didn't cause the pneumonia.
Pneumonia is frequently not brought on by a single virus or bacterium, but rather is secondary to something else going on. It is far too simplistic and entirely untrue to say that someone could never develop pneumonia as an indirect result of a bad response to a vaccine.