BackgroundPatients with primary and secondary antibody deficiency are vulnerable to COVID-19 and demonstrate diminished responses following two-dose SARS-CoV-2 vaccine schedules. Third primary vaccinations have been deployed to enhance their humoral and cellular immunity. ObjectivesTo determine the immunogenicity of the third primary SARS-CoV-2 immunisation in a heterogeneous cohort o... https://www.danddcollectiblers.shop/product-category/baby/