AstraZeneca Pauses Covid-19 Vaccine Trial After Illness in a U.K. Subject--Update
September 09 2020 - 6:43AM
Dow Jones News
By Peter Loftus
AstraZeneca PLC said Tuesday it paused clinical trials of an
experimental Covid-19 vaccine after a participant in a U.K. study
had an unexplained illness.
The company, which licensed the vaccine from developers at the
University of Oxford, said the voluntary pause was a routine action
that would allow an independent committee to review safety
data.
The halt is a setback for the vaccine effort, which has long
been touted as one of the world's most advanced candidates. The
shot had quickly progressed to late-stage studies in various
countries, with AstraZeneca already signing contracts that could
result in the delivery of initial doses this fall.
The pause affects a study that began last week in the U.S.
aiming to enroll 30,000 people, with funding from federal agencies.
The study is testing whether the vaccine reduces the rate of
Covid-19 cases compared with unvaccinated study subjects.
AstraZeneca and Oxford had started a large study of the vaccine in
the U.K. in the spring.
The company is also testing the vaccine in studies in Brazil and
South Africa.
AstraZeneca called the pause a "routine action which has to
happen whenever there is a potentially unexplained illness in one
of the trials, while it is investigated, ensuring we maintain the
integrity of the trials."
It added that it was taking steps to expedite the review of the
event to minimize any potential impact on the trial timeline.
Oxford University issued a similar statement, saying that while
illnesses will happen by chance in large trials, they must be
reviewed independently.
Both the drug company and the university said they were
committed to the safety of study participants and the highest
standard of conduct in trials.
AstraZeneca was among a number of companies, including Moderna
Inc. and Pfizer Inc., to publicly pledge this week to make the
safety and well-being of vaccinated individuals the priority in the
development of the first Covid-19 vaccines.
The study halt was reported earlier Tuesday by Stat.
Investors appeared largely unmoved by the news, with
AstraZeneca's shares falling less than 1% in London in morning
trading Wednesday.
Analysts at Jefferies said temporary pauses were standard
clinical trial practice, and that it wasn't surprising that a
serious adverse event triggered the study to be halted.
AstraZeneca has promised to provide more than two billion doses
of its experimental vaccine and has struck deals to sell the shot
to various countries including the U.S. and U.K. The British
company is also working with partners to provide doses for low and
middle-income countries.
Write to Peter Loftus at peter.loftus@wsj.com
(END) Dow Jones Newswires
September 09, 2020 06:28 ET (10:28 GMT)
Copyright (c) 2020 Dow Jones & Company, Inc.
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