Why are millions still suffering after having COVID-19?

COVID-19 is on the rise again around the world. The United States is currently experiencing its biggest wave of infections since the Omicron coronavirus variant.

But while new cases are making the headlines, the millions of people who are suffering from the pandemic’s lingering aftereffects - known as Long COVID - feel forgotten. Experts warn that Long COVID could be the world’s next public health crisis, so why is the condition still so poorly understood?