Quote:
Originally Posted by O.city
There isn't another "strain".
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Non-peer reviewed but this may explain why different areas have different severity of the virus.
"Analysis of data from the COVID Symptom Study app, led by researchers from King’s College London, reveals that there are six distinct ‘types’ of COVID-19, each distinguished by a particular cluster of symptoms."
https://www.technologynetworks.com/d...iKJ_QnZ5MjauoE