Detailed Instructions: Generate an explanation for the given claim using the provided supporting material from the paragraph. Please consider the following points while generating an output. 1) The claim will always have supporting proof in the paragraph, and the paragraph will have a clear point of view supporting the claim. 2) There can be instances where direct correlation to the claim is not available. Make use of the sentences in the paragraph to provide a corresponding output supporting the claim. 3) The explanation should be at least one and at most twelve sentences long.
Problem:Paragraph: Porcine Epidemic Diarrhea virus (PEDv), which causes diarrhea, vomiting and severe dehydration is transmitted orally and through pig faeces. While older pigs have a chance of survival, the virus kills 80 to 100 percent of piglets that contract it. The total number of confirmed cases has increased to 2,692 in 23 states as of the week ended January 25. Nearly 40 percent of the cases, 1,006, were confirmed in Iowa, the top U.S. pork producing state. As defined by the USDA, each diagnostic case could represent multiple animals at either a single farm site or several locations. The USDA's NAHLN released its latest PEDv data on Wednesday. (here) There are no official figures for pigs lost to the PEDv - which does not affect humans - but up to 4 million pigs may have died from the virus, according to industry analyst estimates. Additionally, the virus was confirmed in Canada last week. PEDv has spread to a fourth farm in the Canadian province of Ontario, the provincial government said on Wednesday, despite the hog industry's efforts to stop it by disinfecting delivery trucks and clothing used on farms. PEDv has forced the U.S. hog industry to increase its biosecurity measures and has fueled concerns hog supplies will slump in the spring and summer. Claim: U.S. pig virus cases see biggest weekly rise since PEDv found.
Solution:
Confirmed cases of a deadly pig virus spreading across the U.S. Hog Belt jumped by 215, its highest weekly increase since it was discovered in the United States in April 2013, according to the USDA's National Animal Health Laboratory Network (NAHLN).