The analysis had therefore separated the respondents into reasonable categories. A comparison of variables across all clusters revealed that the never vaccinated had the lowest knowledge score, risk perception score and powerful others sub-score of MHLC compared to the other clusters (P<0 . 001, P<0 . 001, P=0 . 020, respectively) and this difference was statistically significant. For the vaccinated, there were no significant differences across any variable for the newly vaccinated and continuously vaccinated clusters although there was a trend of higher average scores for knowledge and risk perception in the newly vaccinated cluster compared to those of the other clusters (P=0 . 652, P=0 . 288, respectively). For the unvaccinated, there were no statistically significant differences across the variables except for the MHLC 'powerful others ' sub-score (P=0 . 008).