A string of hantavirus-linked cases reported in Indonesia has sparked fears that the potentially lethal virus could be spreading undetected, with health experts citing widespread rodent exposure and poor sanitation as major risks that could lead to a further spike.Eight cases of haemorrhagic fever with renal syndrome (HFRS), one of the diseases caused by the hantavirus, have been confirmed across four provinces – Yogyakarta, West Java, East Nusa Tenggara and North Sulawesi – as of June 19,...