A team of researchers is testing the effectiveness of a new HPV vaccine. They randomly divide the subjects into two groups.

Group 1 receives the existing HPV vaccine, and Group 2 receives the new HPV vaccine.

The patients in the study do not know which group they are in.

Which is the treatment group?


Which is the control group (if there is one)?


Is this study blind, double blind, or neither?


Which best describes this research?


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