The science of this Aug 2024 paper about #Covid was known clinically in Jan 2020 (attached paper).

If doctors had just read the literature & altered their treatment, millions of people would not have died.

When fibrin is being formed in the body a protein called D-dimer is made and can be measured in a blood sample.

This paper first published January 30, 2000 found D-dimer increased in 36% of patients, the sickest.