No evidence new swine flu strain has spread but scientists will want to know moreEvery time a virus jumps from animals into humans there is a shudder of alarm.
Source: No evidence new swine flu strain has spread but scientists will want to know more (https://news.sky.com/story/swine-flu-no-evidence-new-strain-has-spread-but-scientists-will-want-to-know-more-13017664)