"The irony now is that we're the ones who got sick," said Mutter, whose wife, Gina Mutter, 54, is also ill.
Mutter knows he has a 1-in-3 chance that he got a placebo rather than one of two active treatment dosages, but he said he was willing to take that chance. His wife didn't enroll in the trial.
"I said, there's some risks involved. We're taking one for the team here. I don't think we both need to do that," he said.
So far, Mutter has struggled with a persistent cough and lingering fatigue. He can't tell if his infusion has been helpful, never mind whether it's a cure.
"Just no way of telling if I got the antibodies or not," he said. "Did I get them and that kept me out of disaster, or did I get the placebo and my own immune system did its job?"
(Kaiser Health News (KHN) is a national health policy news service. It is an editorially independent program of the Henry J. Kaiser Family Foundation which is not affiliated with Kaiser Permanente.)
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