The puzzle of masked liberals

The Covid-19 pandemic has brought to surface new and puzzling manifestations of the culture wars between liberals and conservatives, especially in the US. One such manifestation is the one centered around mask-wearing as a way to protect others from viral infection. In public spaces, mask-wearing has become a signal as to whether one is a liberal or a conservative. Liberals tend to wear the mask and condemn as immoral conservatives, who tend not to wear it. I argue that the liberal attitude does not cohere with liberal theory. I use the issue of the permissibility of abortion and the liberal consensus about it as the benchmark for what a genuine liberal attitude toward mask-wearing should be.