Treatment of brain fog, other long COVID symptoms focus of U.S.-based studies

The National Institutes of Health is beginning a handful of studies to test possible treatments for long COVID, an anxiously awaited step in U.S. efforts against the mysterious condition that afflicts millions.

Monday’s announcement from the NIH’s US$1.15 billion RECOVER project comes amid frustration from patients who’ve struggled for months or even years with sometimes-disabling health problems — with no proven treatments and only a smattering of rigorous studies to test…