During an outbreak of pertussis that occurred in a high school, epidemiologists

Question

During an outbreak of pertussis that occurred in a high school, epidemiologists conducted an investigation, which collected complete data on vaccination status of 208 students, 35 of whom fulfilled a pertussis case definition at some point in the last three months and until the transmission stopped. The three months were chosen because the first reported case occurred three months before the investigation. The table below shows the results of the investigation according to DTaP vaccination statu:s DTaP Vaccination Status Fully vaccinated* Received

Explanation / Answer

c) Case control study

This is an example of the above as it is an observational study where two existing groups are considered which have different outcomes. It is basically used to find out factors or identify the same which contributes in understanding as it compared the subjects with particular case with subjects that are not suffering from that particular case. It is a type of epidemiological observational study where the subjects are observed based on their exposure. In this examples the children are observed based on their vaccination for pertussis.

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