How does COVID-19 impact the thyroid?

https://blogs.bcm.edu/2021/01/25/how-does-covid-19-impact-the-thyroid/

Main takeaways are: 

1) pre-existing thyroid dysfunction does not lead to an increased COVID-19 infection rate or a worse prognosis during a COVID-19 infection, 

2) COVID-19 can cause acute hypothyroidism via the non-thyroidal illness syndrome 

3) COVID-19 can cause subacute hyperthyroidism, and 

4) COVID-19 can cause overt thyrotoxicosis via direct inflammation of the thyroid. 

Long-term most acute thyroid dysfunction resolves once the patient has cleared the COVID-19 infection.