Weekend Roundup

On the CBS News "Weekend Roundup" with host Allison Keyes; this week, the CDC recommended booster shots for those who have taken the Moderna or Johnson and Johnson Covid19 vaccines. White House Chief Medical Advisor Dr. Anthony Fauci says although people should stick with the shot they got in the first place, it is safe to mix and match. We'll hear from MedStar Health's Dr. Ruth Kanthula, a pediatric infectious disease specialist, who says some will not understand how that works. The American Medical Association says there is another public health crisis -- the short supply of life-saving drugs. CBS's Mark Strassmann reports. Between April and June of this year, Facebook removed 1-point-7 billion fake accounts, some using real people's names and photos without their knowledge. CBS's Dr. Tara Narula tells us scammers are causing big problems for people, including someone very close to her. In our "More Perfect Union" series, CBS's Omar Villafranca introduces us to an Illinois man who is on a mission