Answer:
A good reason why Alice should choose to be vaccinated is that vaccination helps keep those who cannot be vaccinated safe.
Explanation:
Vaccination or immunization is done by injecting a preparation containing elements of a pathogen - which do not produce disease - to stimulate the immune system. It is a safe way to prevent the spread of a transmissible disease.
Vaccination prevents the appearance of a disease in the person who receives it, in addition to preventing the spread of that same disease to a susceptible person who has not received the vaccine.
Regarding the other options:
- Vaccination reduces the chance of ever getting sick. This is not entirely true. Vaccination prevents illness caused by a specific pathogen, but a person can still become ill from other causes.
- Vaccination prevents pathogens from entering the body. Vaccination does not prevent the entry of pathogens, but it can reduce the harmful effect on the body.
- Vaccination increases the chance that pathogens will be effective. No, the opposite, vaccination makes the pathogen less effective, or harmful.
