This is completely normal in vaccine testing. If anyone gets ill, they stop to find out what’s happening. But the illness may be nothing at all to do with the vaccine, so then they carry on as normal. It’s good that they’re checking, though. But from what I’ve understood from following AZ, they’ve tested more people in Brazil and poss the US if that’s gone ahead, than the U.K., so if this is one person, it could be a random happening like an unrelated illness. I still have faith in them getting a safe vaccine out.