Bioethics also brings in the issues around herd immunity - getting vaccinated not only to reduce one's own risk but the risk to others from transmission and to protect those who are unable to vaccinated for some reason.
Ethics around COVID can also touch on issues of competing rights. The protesters on the weekend would argue for a right to free speech, to freedom of movement and association, and for personal autonomy if choosing not be vaccinated... but their actions will likely lead to restrictions on movement on many others being extended, will likely cause a spike in transmissions, will risk transmission to their families / close contacts.
The ethics of behaviour of those spreading misinformation (whether knowingly or under a mistaken belief in its accuracy) is another area that could be explored. A distressing story on the effects of misinformation that I recently read:
https://www.huffpost.com/entry/anti-vaccine-conspiracy-theories-divorce_n_60faf8b6e4b05ff8cfc8086b
What are the ethical response when one partner is threatening another over vaccination, be it a threat of divorce or of separation from children? What of those spreading the misinformation that led a husband to demand that his wife be tested for HIV, believing that the vaccination would have deliberately infected her? That is just one case on misinformation that one might expect anyone to disregard, and yet there are many people who are being taken in by the most preposterous of claims.