I believe the answer is: positive externality
Positive externality refers to The benefit that enjoyed by a third party when the first and second party are conducting a transaction.
When you receive a vaccines, you prevent yourself from becoming a host that could contaminate other people from getting the virus. In the example above, you and your children are the first and second party. And other children are the third party.
The answer is true.
Explanation is that I just learned about this topic last week and passed the test with this question on it.
1. C
2. F
3. S
4. C
I believe this is correct.
Next part,
Secondary
Secondary
Tertiary
Quaternary
Again, I think you might need a second opinion on this.
