Blood clams contain the hepatitis A viruses and spread several other diseases such as Hepatitis E, typhoid and dysentery. The Shanghai Food and Drug Administration alert people to avoid the clams. They are also known as blood ark clams, red clams and akagai in Japan.
Health officials said that the clams are safe in Japan but not in Shanghai. Shanghai has already barred it since 1988. About 310,000 people were infected with hepatitis A at that time.
People generally boil blood clams and eat them with sauce. This process can’t kill the virus actually. However, some restaurants still serve the clams until the request comes by customers. And the officials are busy targeting such restaurants for selling it.