thursday night. we're following breens on a number of stories tonight. we want to start with a unanimous recommendation from a c.d.c. advisory panel on the moderna and johnson & johnson covid boosters. ten months after the f.d.a. issued the first emergency authorization for a coronavirus vaccine, boosters are now authorized for all three covid vaccines in this country, and there's also news tonight about mixing and matching. the f.d.a. says it's safe to get any vaccine as a booster regardless of which shots they had for their initial immunization. that's right, you can get any booster brand. so there's a lot to get to tonight and cbs's meg oliver is in new york city to lead us off. good evening, meg. >> reporter: norah, good evening. the c.d.c. advisory committee's recommendation today set the stage for the americans to get the moderna or johnson & johnson booster as early as friday. we've also learned the c.d.c. will not change the definition of fully vaccinated. who is who get two shots of pfizer or moderna or one shot of