The company said that this is a normal procedure that is used when a test participant has a potentially unexplained disease.
One of the companies creating the coronavirus vaccine, AstraZeneca, has suspended clinical trials to investigate an adverse reaction in one of the participants in the UK trial.
It is unknown how long this break will be.
Sometimes during tests, reactions are observed that are purely accidental, but if they are serious enough, the researchers suspend the tests until a full investigation is carried out.
“We are trying to speed up the analysis of a single event to minimize the potential impact on test timing,” AstraZeneca said on Tuesday.
The company is testing a vaccine originally developed at the University of Oxford.
“This is a routine procedure that is performed every time one of the test participants has a potentially unexplained illness,” the statement said.