Background The COVID-19 pandemic has caused the worst public health crisis and has impacted global social norms, and disrupted health services, one of which impacts basic immunization. Basic immunization is one of the services at the posyandu, a quick survey conducted in June showed that 75% of posyandu in Indonesia did not provide services due to the COVID-19 pandemic. During this COVID-19 pandemic, parents are worried about their child's transmission of COVID-19 if they meet with other people, and must carry out basic immunizations at health service places due to the absence of Posyandu. Then how about the completeness of basic immunization during a pandemic? Is the attitude and use of the MCH handbook related to the completeness of basic immunization during the COVID-19 pandemic. Method Type of quantitative research with a cross-sectional design, using secondary data photos on the basic immunization record sheet, and primary data in the form of answers to questionnaires by respondents. The sampling technique used quota sampling until 100 samples were met. Inclusion criteria were mothers who had children aged 0-20 months, had an MCH handbook, lived in the Sukoharjo area, were not illiterate, and were willing to be research respondents. Result The relationship between attitude and completeness of basic immunization has p-value = 0.001 (p < 0.05). The relationship between the use of MCH handbooks and the completeness of basic immunization has a value of p = 0.000 (p < 0.05). Conclusion The attitude factor and the use of MCH books by respondents had a significant relationship with the completeness of basic immunization.

COVID-19

attitude

MCH

BASIC IMMUNIZATION