It’s obviously not easy to give up fear of Covid-19, to judge from a recent survey showing that the vaccinated are actually more frightened than the unvaccinated. Another survey found that most Democratic voters are so worried that they want to make it illegal for the unvaccinated to leave home. But before you don another mask or disinfect another surface, before you cheer on politicians and school officials enforcing mandates, consider your odds of a fatal Covid case once you’ve been vaccinated…