AstraZeneca stock plunges after patient’s “serious adverse” reaction to CoronaVirus vaccine


Amid the biggest selloff in markets since March, we suspect news from AstraZeneca’s massive Phase 3 COVID-19 study will not help at all.

Stat News reports that the large, Phase 3 study testing a Covid-19 vaccine being developed by AstraZeneca and the University of Oxford at dozens of sites across the U.S. has been put on hold due to a suspected serious adverse reaction in a participant in the United Kingdom.

An individual familiar with the development said researchers had been told the hold was placed on the trial out of “an abundance of caution.”

Perhaps of even greater import, Stat News reports that a second individual familiar with the matter, who also spoke on condition of anonymity, said the finding is having an impact on other AstraZeneca vaccine trials underway – as well as on the clinical trials being conducted by other vaccine manufacturers.

There are currently nine vaccine candidates in Phase 3 trialsAstraZeneca’s is the first Phase 3 Covid-19 vaccine trial known to have been put on hold.