Seven weeks have passed since the first U.S. case of coronavirus was announced, and the government is failing to account for what could be thousands of additional infections because of ongoing problems with testing.”The system is not really geared to what we need right now,” said Dr. Anthony Fauci, the top infectious disease expert at the National Institutes of Health. “That is a failing. It is a failing, let’s admit it.”Later, during President Donald Trump’s declaration of a national emergency in response to the outbreak, the president was asked if he would take responsibility for the lag in testing, which the president declined.The effort initially was hobbled by delays in getting testing kits out to public health labs, but the stumbles have continued, leading scientists to conclude that the virus has taken root in more places than government officials say.U.S. health officials, for example, promised nearly a month ago to