INCLUDING THE BOOSTER YOU MORE MO RE LIKELY TO BENEFIT. RESEARCHER TRACK MORE THAN 200,000 PEOP WLEITH COVID FROM LATE AUGUST TO EARLY JANUARY. AND COMPARED HOW LIKELY THEY WERE TO GO INTO THE HOSPITAL, BASED ON HOW MANY VACCINSHE S THEY’VE HAD, AND WHEN THEY GOT THEM. THEY FOUND PEOPLE WITH ALL 3 SHOTS, INCLUDING A BOOSTER, REWE 90% PROTECTED AGAINST GOING INTO THE HOSPITAL. PEOPLE WITH TWO SHOTS, WITHIN THE LAST SIX MONTHS AGO, WERE 81% PROTECTED. AND PEOPLE WITH TWO SHOTS,UT B MORE THAN SIX MONTHS AGO, WERE ONLY 57% PROTECTED. >> THAT BOOSTER IS LESS AND LESS OPTIONAL, IT IS SOMETHING YOU SHOULD BE CONSIDERED AS A REQUIREMENT. REPORTER: DR. PAUL BIDDINGER WITH MASS GENERAL SAYS THE STUDY ALSO SHOWS BOOSTER SHOTS, A LEAST RECENT ONES, ARE GOOD., AT PREVENTING YOU FROM GETTING INFECTED IN THE FIRST PLACE AND FROM SPREADING THE VIRUS. THE MASS GENERAL BRIGHAM CHAIN IS REQUIRING ITS EMPLOYEES TO GET BOOSD TET BIDDINGER SAYS. IT’S TOO EARLY TO SAY WHETHER WE NEED TO CHANGE THE DEFINITION OF FULLY VACCINATED FOR THE GENERAL PUBLIC. >> THIS IS DATA THAT IS JUST COMING OUT TODAY. IT IS SOMETHING THAT YOU NEED TO THINK ABOUT THOROUGHLY BEFORE YOU CHANGE YOUR RECOMMENDATION. REPORTER: MEANWHILE, NEW DATA FROM THE STATE SHOWS FOR EVERY TEN PATIENTS CURRENTLY IN MASSACHUSETTS HOSPITALS WITH COVID. ABOUT HALF ARE THERE BECAUSE OF THE DISEASE. THE OTHER HALF WENT TO THE HOSPITAL FOR OTHER REASONS, FROM HEART ATTACKS TO KNEE SURGERY, AND FOUND OUT THEY HAD COVID ONLY AFTER THEY WERE ADMITTED. >> IN A SENSE IT DO NOT TRULY REPRESENT AN ADDITIONALUR BN OF NUMBER OF PATIENTS ON THE SYSTEM. REPORTER: MASS GENERAL IS WORKING ON COMING UP WITH MORE DETA