We have passed 300, 000 cases world wide. People are still congregating in the UK. Their PM says he is being guided by the science. If people have cancer or are vulnerable they should stay home for 12 weeks. There are mixed messages from the UK government. Not travelling is optional.
Places like South Korea have had a major investment in testing very early on. They followed up every positive test result. People in the UK are saying they are fine because they do not have symptoms. (so they keep going out risking getting infected by someone who does have symptoms)