U.S. Salmonella Outbreak Linked To Imported Onions

The CDC has linked a salmonella outbreak to imported onions from northwest Mexico, affecting over 650 people across 37 states. The onions were imported between July 1st and August 27th and distributed by Prosource. The CDC advises consumers to purchase onions with packaging that indicates their origin and to discard any onions without such labeling to prevent illness.

What dates were the onions imported that are linked to the outbreak?

What should consumers look for on onion packaging to ensure safety?