In October, Judith Munz and her husband, Scott Petersen, volunteered for a coronavirus vaccine trial. At a clinic near their home in Phoenix, each got a jab in the arm.
Dr. Petersen, a retired physician, became a little fatigued after his shot, and developed redness and swelling on his arm. But Ms. Munz, a social worker, didn’t notice any change. “As much as I wanted it, I couldn’t find a darned thing,” she said. “It was a nothing burger.”
She knew there was a 50-50 chance that she would get the vaccine, developed by Johnson & Johnson. Judging from her lack of symptoms, she guessed she had received the placebo.
At the time, Ms. Munz thought that anyone who had received the placebo would get the real vaccine as soon as the trial showed it was safe and effective. She looked forward to the peace of mind it would bring.