It appears that it can cause both heart and lung damage.
I’m not a medical professional, and I am an idiot, but it doesn’t look like pleasant results.
The numbers are relatively small here in the UK, but I suspect our actual infected population is far higher than the confirmed numbers.
Just reading about South Korea investigating their outbreak and pinning most of it on one person who, despite being almost certain they were infected, did not get tested or isolate themselves.