I am unable to produce a summary of the requested article because the search results provided do not include an article titled "UK health authorities join forces to champion foreign infectious disease trials" or an article with similar content about UK health authorities supporting foreign infectious disease trials in response to the withdrawal of US research aid. Available search results include information on UK clinical trial reforms, infectious disease conferences and other health topics, but not the specific article you requested to be summarized. In order to create an accurate and factual summary in Slovak, I would need access to the original article.