So what you get is an injection of the vaccine like you have and a legful of the horse serum.

When you've had your tetanus antibodies from the horse serum you then normally develop an allergy to the horse serum.

If you then get it a second time you will then possibly have an allergic reaction to the horse serum.

Now you don't get tetanus cards to carry because you've not had the horse serum.

Two months later, Mr. Wright read medical reports that the horse serum was a quack remedy.

Your body loathes-you are allergic to the horse serum.

Such reactions are probably caused by the horse serum used to make the drug.

Arthus repeatedly injected horse serum subcutaneously into rabbits.

It comes in twenty-milliliter vials and is derived from horse serum.

"He said my treatment was like horse serum: you can only use it once."