Johnson & Johnson has paused all COVID-19 vaccine trials after a participant developed what the company described as an “unexplained illness” during a trial. The pharmaceutical giant had recently begun Phase 3 trials for its vaccine. This comes a month after AstraZeneca paused vaccine trials after two participants developed serious neurological illnesses. AstraZeneca has resumed trials overseas but not in the United States.

In other medical news, The Lancet medical journal has revealed a 25-year-old Nevada man became infected with COVID-19 twice earlier this year, with the second infection more severe than the first.