Via Instapundit comes a story about the return of a once-vanquished nutritional disease, rickets, due to people not watching their children’s nutrition because they assumed that breast feeding would supply all the nutrients needed. This fits a similar pattern in which health concerns that disappeared in most of the West by the 1960s have begun to reemerge.
In all these cases, the cause is an exaggerated concern for an unrelated health matter that generates unintended side effects.