see a variant and merge that spreads just as quickly as omicron but is more deadly? >> it is a possibility. the virus to mutate in a way is higher and higher. it's far more likely will see a variant mutate -- make most mutations are downward mutations over 99%. i do believe we are going to continue to see the virus mutate in the animal kingdom. that animal reservoir spit out new variant in perpetuity. maybe every couple of years or every viral season. but remember there's a host of over dozen viruses that cause the common cold that circulate season to season. it's not something we change our lifestyle around me on standard precautions. david: dr. marty makary i was a pleasure to see your doctor thank you for being here. thanks. we come back businesses breathing a sigh of relief as the supreme court blocks the biden administration vaccine mandate for private employers.