asked 131k views
4 votes
Why most vaccines have to be given by injection?​

2 Answers

1 vote
Most vaccines are given by injection because injection is the simplest way into your bloodstream
answered
User Xameer
by
7.9k points
3 votes
most vaccines need to be given by injection because entering the stomach can make one ill. However entering through the bloodstream doesnt cause illness
answered
User Likk
by
7.4k points
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