A friend recently returned from visiting his elderly parents, both of whom, in their 80s and 90s and living in Texas, have refused a COVID-19 vaccination. The few other members of his extended family gave in to pressure and got one, but only after another of them had died. Meanwhile, hundreds of Texans were going about their daily lives unmasked -- visiting bars, restaurants and movie theaters -- while the delta variant raged, producing stunning casualties among the vulnerable.