americans this summer. and it could get busier over the holidays. bu before you even board a flightou must upload your cdc vaccine card to the airline website. many countries health department also require it. europeans use a phone app that displays their vaccination status. americans can use their cdc card but don t forget it. in france unique to show your cdc vaccine card, to eat at a restaurant. you lllso show your card to get into our shs and orting evts. ven sh your ccine ss to aigh kethroug a fren nation park. we ha to sh to geon an rplanewe havto shoit to g on resurants, museums, any kind of public place, and it s fine we re good with that. while the rules change often, mo european countries do require americans to provide proof of vaccination. but don t require further test and quarantine. the sweden s not alwing amicans toly dirtly from the u.s.. and britain stillrequires testing. despite sporadic protests,