A California nurse who participated in Pfizer’s vaccine study said she had such strong side effects that she feared she had contracted COVID-19.
Kristen Choi, an assistant professor in the School of Nursing at UCLA, said she took part in a double-blind vaccine study in August. In an opinion piece in the JAMA Internal Medicine journal published on Monday, Choi described her experience, saying that at the beginning she was not sure if she had received a placebo or the actual drug – but started to have a “strong suspicion” after the second shot a month later.
