How to use serum viscosity to understand COVID-19 patient risk

2020 has been a strange year all round. An unknown virus, probably in a bat colony in central China mutated to allow it to infect humans too. Within 3 months of the virus being identified as Corona Virus SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2), 90% of the world had shut down... Steve Walton, follows up on his previous article How COVID-19 kills: a tale of two conditions with an outline around how serum viscosity measurements can be used to identify high risk patients for further investigation.