Johnson & Johnson paused its coronavirus vaccine research study due to an adverse reaction by one of the participants and would not provide further comment on the issue.

The 60,000-patient clinical trial was shut down in line with the “pausing rule,” and the online patient enrolling system was closed as well, according to STAT news.

When STAT reached out to J&J to confirm the pause, the company said it was due to “an unexplained illness in a study participant.”

“We must respect this participant’s privacy,” J&J said in a statement. “We’re also learning more about this participant’s illness, and it’s important to have all the facts before we share additional information.” KEEP READING