strict travel restrictions have been brought in for south africa and five neighbouring countries because of concerns in england. adam finn is a member of thejoint committee on vaccination and immunisation, advising the government, and joins me now. how worried are you about this variant? put it into a bit of context because we've had variants before, we've had mutations and no doubt will have some more in the future. , ~ , ., , future. yes, i think it is really important _ future. yes, i think it is really important to _ future. yes, i think it is really important to take _ future. yes, i think it is really important to take this - future. yes, i think it is really i important to take this seriously. future. yes, i think it is really - important to take this seriously. it will be much better to take precautions now than for it to turn out to be a full salam, as has happened previously and react to light and end up with the problem that can't be solved —— full salam. there plenty of reason to be careful and cautious. the reason we are concerned about this mutant is it has so many different changes,