Former Treasury Secretary Larry Summers compares falling inflation to a half-way healed 'infection' that could worsen if not treated properly

• Former Treasury Secretary Larry Summers said it's hard to judge whether falling inflation will stay down. 
• He compared inflation to a half-way healed "infection" that could return, in a harder fight for the Fed if not properly treated. 
• "The hard thing to judge is whether inflation is on a strong enough downward trajectory to get to the 2% target," Summers said. 

Former Treasury Secretary Larry Summers compared falling levels of inflation in the US economy to a half-way healed "infection" that could worsen if not treated properly.