the cdc change its guidance to say that the pfizer and moderna vaccines are preferred over the j&j. why? well, those very rare blood clots connected to the j&j that can be fatal. meantime -- hamilton, among the broadway shows canceling performances once more after cases cases amongst the cast, just two months after reopening. princeton and nyu just joined cornell and others moving what is left of the semester back online. a depressing dose of deja vu. they are warning don't party with people outside of your house holdover the holidays. >> it is hard and it feels impossible and it feels unfair. these gatherings when we get together with friends and family are when we infect each other with covid. >> reporter: pro-sports teams,