whether people need to rethink their holiday plans to stay safe. we'll bring in marty makary, fox news medical contributor from johns hopkins university. a couple of things here. dana and i were talking during the break. cdc recommends pfizer and moderna over the j&j shot. is that significant? >> we're learning that j&j has this complication in women 30 to 50 years of age and it is a one in 100,000 risk of a blood clot. it doesn't matter which vaccine you get. now we're being a little more judicious and telling women in the age group to try another vaccine. some countries don't recommend moderna because of myocar diet is. >> hong kong study says omicron spreads 70 times faster.