Bit off topic, but speaking of shellfish: i remember seeing a video from steve mould about clams being the reason that hepatitis A was spread all around europe. Apperantly a sewage system in wales overflowed during a storm, while exactly one family in that area was infected with Hep A. The overflow was right in the area of shellfish harvesting. so the filter feeding clams collected the hep A virus. People that eventually ate those clams got infected. so, one family in wales managed to infect people all over europe with hep A, through shellfish.<br><br>Edit: just checked and it was apperantly mussels, not clams.