The Access to COVID-19 Tools (ACT) Accelerator is a global initiative between multiple partners to ensure equitable access to life-saving tools for COVID-19. WHO has published the ACT-Accelerator Investment Case, which provides an overview of the ACT-Accelerator, its goals, and the investments that are required to carry out its mission. WHO Director-General Dr Tedros emphasized that “vaccines, diagnostics and therapeutics are vital tools – but to be truly effective they must be administered with another essential ingredient, which is solidarity”.