Vaccinations convey ________ to third parties.

A) positive externalities
B) negative externalities
C) economies of scale
D) public goods

Positive Externalities

These are benefits that a transaction or activity provides to those not involved in the transaction or activity.

Negative Externalities

Costs suffered by a third party as a result of an economic transaction that they were not directly involved in.

Economies of Scale

Cost advantages reaped by companies when production becomes efficient, typically resulting from increased production where the cost per unit of output drops as scale increases.