Johnson & Johnson Covid-19 vaccine study paused due to unexplained illness in participant The study of Johnson & Johnson’s Covid-19 vaccine has been paused due to an unexplained illness in a study participant. A document sent to outside researchers running the 60,000-patient clinical trial states that a “pausing rule” has been met, that the online system used to enroll patients in the study has be

AstraZeneca Covid-19 vaccine study put on hold due to suspected adverse reaction in participant in the U.K. A large, Phase 3 study testing a Covid-19 vaccine being developed by AstraZeneca and the University of Oxford at dozens of sites across the U.S. has been put on hold due to a suspected serious adverse reaction in a participant in the United Kingdom. A spokesperson for AstraZeneca, a frontrun