(CNN) Drug giant AstraZeneca said Tuesday it had paused global trials of its coronavirus vaccine because of an unexplained illness in one of the volunteers. It's a standard precaution in vaccine trials that is meant to ensure experimental vaccines don't cause serious reactions among participants. Earlier Tuesday, AstraZeneca joined eight other companies in signing a pledge promising they would not seek premature government approval for any coronavirus vaccine. The AstraZeneca vaccine is one of three coronavirus vaccines in late-stage, Phase 3 trials in the US. Common adverse events in vaccine trials include fever, headache, soreness at the injection site and muscle pain.

Source: CNN September 08, 2020 23:37 UTC