Diseases suppressed during Covid are coming back in new and peculiar ways

The Covid-19 pandemic has abated in much of the world and, with it, many of the social restrictions implemented to curb its spread, as people have been eager to return to pre-lockdown life.

But in its place have emerged a series of viruses behaving in new and peculiar ways.

Take seasonal influenza, more commonly known as the flu. The 2020 and 2021 U.S. winter flu seasons were some of the mildest on record both in terms of deaths and hospitalizations. Yet cases ticked up in February and climbed further into the spring...