The purpose of this public service advertisement (PSA) is "to convince people to get their vaccinations." The message specifically encourages individuals who have already been vaccinated to receive a booster shot.
Look at this public service advertisement.
A poster that reads, "Vaccinated? Get a booster!"
What is the purpose of this PSA?
to convince people to become astronauts
to convince people to get their vaccinations
to convince people to boost their knowledge of bees
to convince people to learn about space travel
1 answer