3 years ago

Why most vaccines have to be given by injection?

2 answers:

5 0

Most vaccines need to be given by injection because entering the stomach can make one ill. However entering through the bloodstream doesnt cause illness

wolverine [178]3 years ago

3 0

Most vaccines are given by injection because injection is the simplest way into your bloodstream

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Why most vaccines have to be given by injection?​

Why most vaccines have to be given by injection?