Physicians who treat children who develop a strange polio-like syndrome known as acute flaccid myelitis had been steeling themselves this fall for an onslaught of cases of the irreversible condition, which appears to be triggered by infection with an enterovirus known as EV-D68. Like many respiratory viruses, circulation of EV-D68 appeared to be suppressed by Covid-19 control measures earlier in the pandemic. But in late August and September hospitals in various parts of the country started admitting little kids with telltale signs of EV-D68 infection, which in the respiratory phase looks like a bad asthma attack in a child who doesn’t have asthma.  View More