[going hot]

...will produce a range of symptoms as a response, such as inflammation, fever, etc. That is in fact why they are called toxins.

Not really why they are called toxins. There are a host of toxins that cause neither fever or inflammation. They simply put an end to metabolism, you die.

[MarMema]

Actually you are incorrect re: part of your statement. A toxin *always* has the ability to produce illness, fever, etc. It depends on the host whether it does or not.

For instance the chemo patients we see are far more likely to succumb to a toxin than you or I might be.

See my post above for the definition of a toxin. When someone gets sick from an infection, it is the toxin produced that is making them sick. When you get a vaccine, you are getting ( most often) the toxin along with parts of the cell membrane.