John Has Just Taken a Job as a PHN at the Local

John has just taken a job as a PHN at the local public health department in a high-income county adjacent to a large metropolitan area. He has been asked to work with the team that does outbreak investigations and conducts surveillance. There has been an outbreak of measles in the county that his public health department serves. John was asked to put together an alert to parents related to the outbreak. What is one aspect of this type of outbreak that presents substantial challenges to persons working in a local public health department like John's?

A) Poor access to medical care
B) Person-to-person transmission
C) Low economic status.
D) Inadequate sanitation systems