Fig. 2
From: Patients’ high acceptability of a future therapeutic HIV vaccine in France: a French paradox?
Multivariate analysis of the HIV vaccine acceptability. The angle formed by two vectors is proportional to the correlation between the two variables. Thus, the smaller the angle, the more the variables are correlated with one another; two vectors whose angle is approximately 180 ° indicates a strong negative correlation; finally, two vectors whose angle is 90 ° reflects and absence of correlation between the two variables associated with these vectors