A local health department investigates a Salmonella outbreak. PFGE results from multiple patients show indistinguishable patterns. However, WGS reveals some genetic differences among the isolates. What does this suggest about the outbreak?

On the island of Sumatra, Indonesia, May 11, 2025, was declared National Measles Vaccination Day. The campaign’s goal was to provide vaccine coverage for at least 83% of the children on the island. The campaign organizers knew it was unrealistic and unnecessary to attempt 100% vaccine coverage. Based on what principle did the campaign organizers set their goal of 83% vaccine coverage?

The 2004 U.S. National Academies of Medicine report concluded that there is no epidemiological evidence to support a causal link between thimerosal in vaccines and autism.

Continued from the question above: You now have seven confirmed cases of Pertussis in the hospital and two more probable cases complaining of coughing, whooping sounds, and vomiting after coughing. All of the cases have occurred from 5/17 to 5/23, and all are from Illsville Elementary School. Please write a working outbreak case definition for a confirmed and probable case for this outbreak. These definitions will help you distinguish between who is and is not a part of the outbreak. Make sure to include all necessary attributes to define a case and a probable case in your definitions. 

The Vaccine Adverse Event Reporting System (VAERS) is an active surveillance system designed to ensure that all vaccine-related adverse events are captured and investigated.    

A 7-year-old child is bitten by a stray dog while traveling abroad. The child is given rabies immunoglobulin at the hospital and later receives a series of rabies vaccinations. Which type of immunity does the rabies immunoglobulin provide?

Using the information from the question above. You know that the incubation periods for viral gastroenteritis range from less than a day to about one week. When conducting your interviews, what specific date range would you choose to focus on to ask questions about potential risk factors? Do not include the one outlier on 3/6 when considering your date range.   Figure 1. Onset of gastroenteritis among students, University X, Montana. March 1998. (N=72) (Date of onset was not known for three ill students.)   

The graph below represents the immunoglobulin (Ig) response from an individual who was exposed to Dengue Virus for the first time. Match the part of the graph (left column) to the proper label (right column).

Child care centers may only hire a person convicted of a crime against a child if the incident occurred more than 25 years ago.

Employees hired with a contract may have their employment terminated at any time.