One of the major casualties of the Trump administration 2.0—apart from truth itself—is the utility of vaccination as a guard against disease. It has been pretty much established by now that the dramatic rise in the world’s population in the 20th century despite the steep decline in fertility rates in the second half owes much to improvements in public health. A large part of that is the availability of vaccines for diseases that were hitherto considered fatal. Take diphtheria, f