Doctor explains what you need to know about listeria outbreak

PLANT INCLUDING 71 PRODUCTS SHIPPED NATIONWIDE, EVEN TO PLACES LIKE MEXICO AND THE CAYMAN ISLANDS. LET'S BRING IN NBC NEWS MEDICAL CONTRIBUTOR , DR. GUPTA, HOW COULD THIS HAPPEN IN THE FIRST PLACE? >> UNFORTUNATELY, VALERIE, THIS IS A RISK. THE FDA HAS STRICT FOOD PROTOCOL IN PLACE, BUT SOMETIMES THIS HAPPENS. LISTERIA OUTBREAKS DO HAPPEN. TWO UNFORTUNATELY HAVE DIED IN THIS VERY LARGE OUTBREAK. WE NEED SYSTEMS IN PLACE TO MAKE SURE OUR FOODS ARE SAFE AS POSSIBLE. >> HOW CONCERNING IS LISTERIA? >> IT IS, IT IS A SERIOUS INFECTION. FOR THOSE ESPECIALLY AT THE EXTREMES OF AGE, NEWBORNS, PREGNANT MOMS, THOSE WITH WEAKENED IMMUNE SYSTEMS, MEDICATIONS, IT IS SERIOUS FOR THOSE WITH WEAKENED OR IMPAIRED SYSTEMS, OR WHO ARE AT HIGHER MEDICAL RISK. THE CASE OF SERIOUS INFECTION EVERY YEAR, ABOUT 260 ACTUALLY END UP DYING. AND AGAIN SYMPTOMS CAN BEGIN TWO WEEKS AFTER. IF YOU THOUGHT YOU MIGHT HAVE EATEN SOMETHING CONTAMINATED, THINK ABOUT THE MEAT YOU HAVE BEEN BUYING. >> WHAT CAN CONSUMERS DO? >> I WOULD SAY IF YOU BOUGHT PROCESSED DELI MEATS BOARS HEAD BRAND RECENTLY IN THE LAST FEW WEEKS, LET'S SAY THE END OF JUNE, JUST THROW IT AWAY. THERE ARE MORE PRODUCTS ON THE CVC WEBSITE UNDER THIS RECALL. IT'S VERY COMP LOCATED. IF YOU OR SOMEONE YOU KNOW HAD BOUGHT BOARS HEAD RECENTLY ASSUMED IT IS INFECTED AND CLEAN YOUR REFRIGERATOR, CLEAN WITH SOME TYPE OF DETERGENT CLEANER, REALLY CRITICAL HERE. AND IT'S IMPORTANT TO ALSO HAVE THAT CONVERSATION WITH YOUR MEDICAL PROVIDER. IF YOU THINK YOU MAY HAVE ACCIDENTALLY EATEN SOMETHING,