The immunization practice of pharmacists has only been recently approved in the Philippines; thus, it is imperative to assess their engagement using the Knowledge, Attitudes, Practices (KAP) model. A descriptive quantitative-correlational study that utilized a convenience sampling technique was conducted with 90 respondents. A 49-item self-made questionnaire was employed through Google forms. The data collected was subjected to various statistical treatments for descriptive and correlational analysis. Results showed that respondents have a high level of knowledge regarding the prevention of Adverse Events Following Immunization (3.81), and critical thinking and decision-making upon its occurrence (3.92). The respondents' attitudes also showed high levels of agreement toward the promotion of immunization (3.89) and patient counseling (3.97). Moreover, the majority of the respondents administered vaccines (87.78%) and COVID-19 was the vaccine given the most (77.78%). Their responses showed a high level of practice in the immunization process (3.95), documentation and record-keeping (3.80), and addressing misconceptions (3.94). Most of their sociodemographic profiles do not have a significant relationship with their KAP except for the area of practice that had a correlation to knowledge. Thus, this study proves that Filipino immunizing pharmacists have a high level of engagement amidst the pandemic and continuous training and certification are needed to further strengthen this, especially during public health emergencies.

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