The food safety starts from purchasing the foods from the supermarket. There are several measures taken by the US government in the manufacturing process by implementing the HACCP rules. It is also cover the proper packing and storage of foods as per the defined HACCP norms. Some perishable goods are treated with proper care while selling in the supermarket. You must have to take extra care while purchasing the foods from the supermarket. It is not advisable to buy the food that is available in loose pack. It is also seeing that some perishable products must be sterilized or not. If you select the poultry products than you need to see the packing is proper. Same way you can also see the meat, poultry, with fish products are packed under individual air tight plastic bag in order to the water does not contaminate other foods during the shopping.
No, it is not suitably buys the frozen food to like the freezing seafood if it is available in loose pack. You must see that it will be available fresh in any condition. It is also see that frozen foods are packed less than five hours.