Marks & Spencer has recalled chicken products due to a risk of salmonella contamination. The recall appears to be part of a larger issue, with other supermarkets such as Tesco, Aldi, Sainsbury's, Asda, and Morrisons also removing products from shelves over health risks, possibly related to salmonella. The specific products and scope of the recall are not entirely clear, with some reports mentioning multiple chicken products and others referencing a broader range of affected items.