In a recent blog post, she has built a model to show when it would be okay to mandate for the general population a vaccine against sexually transmitted disease. In this vision, she has the U.S. going so sex crazy that, I'm guessing, she sees Catholic nuns leaving the convent to get in on orgies.
When all is said and done, 50% of the country has sexually transmitted diseases and, therefore, yes, in a Beltarian world, vaccines for sexually transmitted disease should be mandated.
Here's McArdle in her own words:
The government does not have a right to mandate vaccination for your own good. But it does have a right to do so when being unvaccinated is a physical threat to others who engage in normal behavior.Yes, for a Beltarian, apparently liberty stops if 50% of the country has gone orgy crazy.
In our society, we have defined "having sex with someone who has ever had sex with another person" as a normal behavior--yes, even devout Catholics believe it is fine to marry a late convert, or a widower. When 50% of the population has had the disease in question, and it is transmitted by activities that we consider a normal part of life, it's within the realm of public health.