This question has options. Select from options: Read this fact: "vaccines can help prevent illness"

Now answer this question: "Children are more likely to get smallpox if"

Options are: - their parents base their medical decisions on advice from has-been adult entertainers. - they undergo vaccination at an early age. - they're vaccinated when they're young. - their parents understand basic science.
their parents base their medical decisions on advice from has-been adult entertainers