It’s an old internet hoax. See posts #7, #14 and #31. I feel sorry for the man’s widow and children.
No, the hoax is on those who believe the same government who administers the bioweapons in its denial that there was no letter to be published.
Some people worship the government, maybe you’re one of them, I don’t know.
What we do know from empirical evidence is that this pandemic has been used/leverages to push the bioweapons in batches of the gene serums. And to make sure the emergency use authorization is justified the governments of many nations colluding in full fascist mode, essentially outlawed all prophylactics and early treatment for the virus the gene serums are hardly effective against, while covering up the killings by the weapon.