the change to that. but just a few days earlier on friday, president biden said it was not yet the recommendation of his medical experts to shorten that period. beyond, of course, the science evolving, it is also clear that there are economic implications here. those airlines, for example, that have had to cancel flights, they have been putting a lot of pressure on the government to make changes because of economic ramifications. laura, paula? >> jeremy diamond, thank you for that. we've been talking about covid all morning. the cases of the flu also spiking across the united states according to the cdc. with omicron surge, the country now faces the dual threat of these viruses. last year there were very few cases of the flu mostly because more people were wearing masks and we had more indoor capacity limits and more social distancing. now researchers say one of the main flu viruses has mutated and current vaccines may not do much to prevent infection. but, and this is key, getting a vaccine should prevent severe illness whether it is the flu or covid.