Why won't they disclose the ingredients of the pneumonia vaccine?

Vaccine ingredient disclosure varies by regulatory practices and proprietary considerations. Pharmaceutical companies may choose not to disclose specific ingredients to protect trade secrets or because certain components are considered standard in vaccine formulations. Additionally, regulators like the FDA ensure that vaccines meet safety and efficacy standards, which can sometimes lead to less detailed public disclosure. However, general information about vaccine components is typically available through health organizations and vaccine information sheets.