What do immunization and vaccination have in common?

Immunization and vaccination are often used interchangeably, which is why the correct answer is that both terms are synonymous in their meaning. Vaccination specifically refers to the process of administering a vaccine to help the body's immune system develop protection against disease. Immunization is a broader term that encompasses the overall process through which a person becomes protected from infectious diseases, which can occur through vaccination or natural infection.

In understanding this relationship, it's important to note that while vaccination is a proactive measure taken to prevent diseases, immunization is the end result of that process. Both contribute to the broader goal of public health, which is to establish herd immunity and reduce the prevalence of infections.

The other choices do not accurately describe the relationship between the two terms. For instance, infection is not involved in the definitions of either term; instead, the focus is on preventing infection through vaccination. Additionally, neither immunization nor vaccination is primarily about treating existing health conditions, nor do they focus on individual symptoms; rather, they are preventive measures aimed at community health.