AstraZeneca manufacturing error clouds its COVID-19 vaccine study results Chicago TribuneAstraZeneca’s best COVID vaccine result was a fluke. Experts have questions Ars TechnicaAstraZeneca manufacturing error clouds vaccine study results The Associated PressAstraZeneca Defends Dosing Error in Covid-19 Vaccine Trial The Wall Street JournalAstraZeneca skids another 2% as confusion remains over vaccine Seeking AlphaView Full Coverage on Google News