US preliminary of AstraZeneca COVID-19 immunization may continue this week: Sources Kumar Jeetendra | October 21, 2020 AstraZeneca Plc’s COVID-19 vaccine trial in the United States is expected to resume as early as this week following the U.S. Food and Drug Administration completed its review of a severe illness in a study participant, four sources told Reuters. AstraZeneca’s large, late-stage U.S. trial was on hold since Sept. 6, following a participant at …