We want to see that flow through, but it will take some time.".US Vice President JD Vance has left for Switzerland to join peace talks with Iran.Envoy Steve Witkoff and senior aide Jared Kushner are already there, along with the Iranian delegation including Foreign Minister Abbas Araqchi.The talks to finalise an interim deal on peace could be complicated by Iran's decision to once again close the Strait of Hormuz, citing what it called Israeli crimes in Lebanon and a US violation of commitments to establish a ceasefire.US Central Command says 55 merchant ships had already transited the strait on Saturday, and that US forces would ensure the flow of ships continued..Experts say the risk to human health from the H5N1 strain of bird flu remains low, after Australia recorded its first case of the disease in a migratory bird in Western Australia.Globally, H5N1 bird flu has now been detected on all continents, and has caused millions of deaths in wild birds and marine mammals.Agencies like the World Health Organisation and the Food and Agriculture Organization say the risk to the human population from the virus remains low.Infectious diseases specialist Sanjaya Senanayake - at the Australian National University - has told SBS, members of the public should still heed the advice to avoid contact with sick or dead birds, and to report unusual animal symptoms to authorities."We have seen a few cases, but it is not easy for a human being to get this But human cases with this particular strain of bird flu are not common