@WSJ 4 years ago Select airports as well as airlines including United and JetBlue are experimenting with apps that use blockchain technology to verify if travelers are Covid-free before boarding #WSJWhatsNow t.co
@WSJ 4 years ago Select airports as well as airlines including United and JetBlue are experimenting with apps that use blockchain technology to verify if travelers are Covid-free before boarding #WSJWhatsNow t.co