It can be spread easily along the production chain, making it difficult to track. >> they send inspectors out to try to find the contaminated food. that can often take days, weeks or even months. >> reporter: already nearly 2,000 people have fallen ill. a lawsuit was filed on behalf of an 11-year-old california girl. >> she was hospitalized for a period of three or four days and incurred significant, significant in the tens of thousands of dollars, in medical expenses. >> reporter: federal officials said no new disease clusters had been identified and no more recalls are expected. meaning the ...