Johnson & Johnson halts Covid vaccine trial due to illness   

This September 2020 photo provided by Johnson & Johnson shows a single-dose COVID-19 vaccine being developed by the company. Picture: Cheryl Gerber/Courtesy of Johnson & Johnson via AP

Johnson & Johnson halted clinical trials of its Covid-19 vaccine after a participant fell ill, the second time that a front-runner developer has paused testing in the race to create a viable immunization against the virus.

The participant’s illness is being evaluated, the US-based company said, adding that it would share information after further investigation.