joseph falise, clinical nursma ger at the universitof miami health system. thank you very much.d lucin all your work. >> thank you very much. thank you for bringing this up. >> woodruff: south korea has turned froa covid-19 hot zone to a leader in the global figh against the new coronavirus. companies there are now maki millions of virus test kits for expod the public is voting in a parliamentary electionep despite themic. correspondent bruce harrison reports from seoul on how the koreans have worked togeer to get this far, and aim vent a resurgence of the virus. >>eporter: to visit this factory, you can't risk contaminatg the product. the work going on behind this door may just save your life. manufacturer bak jin-wook says they're putting chemical agents into vials and sealing the lids. the assembly line at south korean firm gencurix is small. but the chemicals they're paedaging just today can be in up to 150,000 covid-19 tests. this is the final product. >> ( translated ): each of these kits can be used to test up to0 ople. a sample is collected from the patient's nose or uth