I would like to ask my fellow group members to learn if any of you are, will have, or was in a similar situation to mine. I am fully vaccinated (2x Pfizer) administered by UCLA in Santa Monica,California. Born and raised in Budapest, Hungary but I'm not a dual citizen. US Citizen only. I recently bought my flight ticket through United Airlines who allows passengers to upload their Vaccination Certificate online -which I did. The purpose of my travel is a business trip and I do have all the necessary acceptable documents to prove my purpose of traveling to Hungary. My one and only concern/worry is the so-called "PCR" Test. The concern is based on the fact that my US Covid-19 Fully Vaccinated Certificate is not recognized in Europe. My reservation (Flight +hotel) seamlessly went through online with priceline and my Airline Company is United Airlines. The trip will take me from LAX to Denver Intl. Airport to Frankfurt, Germany Intl. Airport. From there Lufthansa takes over to fly me to Budapest, Hungary (Liszt Ferenc Intl. Airport), which is my final destination. Here comes the concern: The PCR Test. My friend advised me to get in touch with United Airlines to get answers to my question about the PCR Test. I would like to know if any of you here experienced -went through - similar situation and if yes how was it? Thank you very much in advance.