It is one of many mysteries about long COVID-19: Who is more prone to developing it? Are some people more likely than others to experience physical, neurological or cognitive symptoms that can emerge, or linger for, months after their coronavirus infections have cleared?

Now, a team of researchers who followed more than 200 patients for two to three months after their COVID-19 diagnoses report that they have identified biological factors that might help predict if a person will develop long COVID-19.

The study, published Tuesday by the journal Cell, found four factors that could be identified early in a person’s coronavirus infection that appeared to correlate with increased risk of having lasting symptoms weeks later.