CDC relies on landline phones for health surveys , conducted every year . `` I 'd expect today in 2009 the rate is probably 5 percentage points higher , perhaps even more , '' he said . Survey ##s for national health policies for health insurance , education and etc . 26 percent of counties were cell phone - only counties ; Vermont had 5 percent .
CDC relies on landline phones for health surveys , conducted every year . Survey ##s for national health policies for health insurance , education and etc . 26 percent of counties were cell phone - only counties ; Vermont had 5 percent .