Which data element is commonly collected for notifiable disease surveillance?

• A. Injury history
• B. Vaccination status
• C. Eye color
• D. Hair color

Answer: (B)

Notifiable disease surveillance aims to track who is affected, where, and when, so public health actions can be targeted and effective. Vaccination status is routinely collected because it directly informs how protected the community is against vaccine-preventable diseases. Knowing who has or hasn’t been vaccinated helps assess overall vaccine coverage, identify groups at higher risk, and guide outreach or vaccination campaigns. It also allows public health to evaluate vaccine effectiveness in real-world settings and understand outbreak dynamics, such as whether cases occur predominantly among unvaccinated individuals or if breakthrough infections are happening.

Injury history, eye color, and hair color don’t influence disease transmission or immunity, so they aren’t useful for guiding surveillance and response efforts.