In a democracy I don't think there's a clear demarcation line between determining the best public policy and individuals determining the proper actions for them

In a democracy I don't think there's a clear demarcation line between determining the best public policy and individuals determining the proper actions for themselves. Individuals may choose to protest, despite their belief that doing so will spread the pandemic, because they also believe that protesting will make it less likely for other people to die for other reasons. Spreading the pandemic by protesting might make them morally culpable of murder in some sense, but failure to protest might similarly make them morally culpable of murder in some sense. These individuals are making public policy decisions when they weigh one of these concerns against the other. As participants in a democracy, there's no way to avoid making such decisions.