The people who have experienced long-term effects are extremely vocal online but it's hard to imagine that it is as common as 1 in 10 given how many people have had covid.

I am extremely curious to see if they find a genotype or something which is an indicator for people being vulnerable to long-covid. It's possible that it will end up being a similar situation for ME/CFS where we have no specific biological markers which differentiate people who suffer from it (aside from the symptoms).