抄録
New Porcine Epidemic Diarrhea (PED) began occurring in Asia in the 2010s. The PED spread to United States, Canada, Mexico, Korea, Taiwan and Japan during 2013 and 2014. PED occurred for the first time in the United States in April, 2013. The United States was a PED-free country until then, and pigs in the United States did not have immunity against it. Therefore infections of the PED virus in the United States caused the deaths of millions of piglets. On the other hand, in Japan, an outbreak of PED occurred in the 1990s, and a live vaccine for PED has been already approved. There were the sporadic occurrences of PED in Japan, but there was no full-blown outbreak, so it seemed that PED was under control in Japan. However, another outbreak of PED occurred in Japan in 2014. In this report, I focus on the background of this outbreak and describe the PED.
