In scramble to stop virus, testing raises tough questions

Health officials confronted tough questions and doubts Thursday about testing to intercept the fast-spreading virus, with scrutiny focused on a four-day delay in screening an infected California woman despite her doctors’ early calls to do so.The questions are global: not just who, when and how to test for the illness, but how to make sure that working test kits get out to the labs that need them.All those issues apparently came in to play in the treatment of the woman in northern Californ