They knew that therapeutics worked, that Vitamin D and zinc deficiency were issues.
They also knew very early on that OBESITY and all the comorbidities related to obesity - hypertension, heart disease, type 2 diabetes - were the second most critical risk factor leading to severe illness and/or death.
And yet, you never heard them talk about that. At all.
They knew a month into the pandemic who was dying and why, but they kept quiet on it.