SI Session 4/9

Multiple Choice

Who is Typhoid Mary?

• A famous chef in the 19th century
• A renowned scientist who discovered the typhoid fever vaccine
• A character in a popular TV show
• First identified asymptomatic carrier of typhoid fever in the US

Multiple Choice

Who is John Snow?

• Studied Cholera in London. Considered the father of epidemiology.

• First identified asymptomatic carrier of typhoid fever in the US

• A fictional character from Game of Thrones
• One of the men who invented the Polio vaccine.

Multiple Choice

What is FALSE about herd immunity?

• Level can be altered by changes in the pathogen

• Resistance of a population to infection and to spread of an infectious organism because of the immunity of a large percentage of the population

• Level can be altered by introduction of new susceptible individuals into population

• All are true, none are false.

Multiple Choice

Which of the following is NOT a reservoir?

• Infected animals

• Healthy individuals

• Symptomatic infections

• Asymptomatic carriers

Multiple Choice

How do DNA vaccines work?

• DNA vaccines work by introducing DNA containing the gene encoding the antigen into the body, leading to antigen production and immune response.
• DNA vaccines work by altering the genetic makeup of the individual
• DNA vaccines work by directly injecting the antigen into the bloodstream
• DNA vaccines work by targeting only specific types of pathogens

Fill in the Blanks