An academic, peer-reviewed paper has been published putting the philosophical case for vaccine refusal, not just in the context of Covid-19, but for all vaccines. The core argument goes against the present medical paternalism, that technocrats know best, and that individual liberty is a value that can be balanced, and trumped by social utility. Vaccine mandates make our natural immunity problematic, and this should not be so. Apart from ethical considerations, the science is supporting this, since numerous studies have shown that natural immunity is superior by many degrees to any alleged protection provided by the vaccines.
https://jme.bmj.com/content/early/2021/10/20/medethics-2020-107026