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One particular drugmaker "suspends" vaccine trial. Astra Zeneca
It appeared it was a side effect resulted from a large dosage. It is better to catch such events in this late stage of trial testing.
Paul Offit, a pediatrician and vaccine expert at the Children’s Hospital of Philadelphia, said the AstraZeneca shot involves giving large doses of a monkey adenovirus engineered so it can’t replicate. It is therefore important for researchers to investigate whether the adverse event wasn’t somehow being triggered by a reaction to that large viral dose, he said.
“When you have that kind of viral load, you can have side effects,” said Offit. The question is whether the adverse event could somehow be related to the large number of viral particles being given, or whether it is just a coincidence. If after investigating, the monitoring board is comfortable there are reasons unrelated to the vaccine to explain the adverse event, the trial will be able to continue, he said.
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