Why can a non vaccinated person be protected from a disease if they are a part of a group that is vaccinated?

Question

Why can a non vaccinated person be protected from a disease if they are a part of a group that is vaccinated?

Answer 1

They cant.  If they aren't vaccinated they could get the disease while every one else wouldn't.

Answer 2

The non-vaccinated person is only "protected" in the sense that the people around him will not get the disease and so he is unlikely to catch it from them.  However, the non-vaccinated person CAN still get the disease from someone else or through whatever mode of transmission is normal for that virus.

Answer 3

They wouldn't be protected, but the chance of them getting it is decreased because they wouldn't be around people who are actively ill with the disease. However, those around them could still be short-term carriers.

Answer 4

genreally speaking, no.

In order to do this, you would have to catch the diease, then live through it.  I hope its not typhoid fever you're talking about. . . . .!!!

A vaccine inserts dead disease germs into your blood.  Your body sees dead germs as "invaders", and makes the necessary chemicals (antibodies) to kill them.  But since they are alraedy dead, the disease germs can't hurt you. But you body now has the proper chemical, and is "immunce" to attacks from live germs.

But the dead germs cannot be passed from one person to another.  Only live germs do that.  So someone who is vaccinated cannot "ionfect" someone who isn't.

So YOU need the vaccinations, too.