Anecdotally, I don't think half of those in the UK have had a day or more of ill-effects afterwards. We do hear of those that get ill effects though, amplified

Anecdotally, I don't think half of those in the UK have had a day or more of ill-effects afterwards. We do hear of those that get ill effects though, amplified by social media channels and press. You don't hear about the majority that don't feel ill.