government has said they believe the decision by the uk may have been hasty especially because there were still meant to be discussions with the world health organization to get an idea of a uniform reaction. we have seen a statement a few minutes ago of the world health organization cautioning about hastily imposing travel bans because they understand that it travel bans because they understand thatitis travel bans because they understand that it is something that is difficult, whose effect is difficult, whose effect is difficult, to reverse, and something south africa themselves have seen in the past few months.— the past few months. thank you very much. our medical editor fergus walsh is with me now. so many uncertainties. it begs the question, how concerned should any of us be? , ., ., ~ ., , ., of us be? very hard to know but a real heart — of us be? very hard to know but a real heart sinking _ of us be? very hard to know but a real heart sinking moment - of us be? very hard to know but a real heart sinking moment when i i of us be? very hard to know but a - real heart sinking moment when i was listening to scientists say this is the most worrying variant they have seen so far on paper. in practice hard to know. the south african