Can I travel for an academic visit and tourism on the same VWP?

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I will travel to the USA in October to attend a friend's wedding. I will also be visiting a lab afterwards on the same trip (I was invited to collaborate without any remuneration). The total duration will be 30 days (2 weeks wedding/vacation, 2 weeks lab visit). I can provide evidence of my invitation to both the wedding and the university.
I am a UK citizen with a valid ESTA. When going through the CBP check what do I say the primary reason for my visit is? Do I apply for the W-T or W-B waiver? Or is it possible to do both?
Thanks!
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How many times can I enter the US on the VWP?
There is no limit on the number of times you may enter the U.S. under either ESTA of a visa.Can you have both a ESTA and a visa?
An approved ESTA is not a visa. It does not meet the legal or regulatory requirements to serve in lieu of a U.S. visa when a visa is required under U.S. law. Individuals who possess a valid visa will still be able to travel to the United States on that visa for the purpose for which it was issued.Is ESTA and VWP the same?
Electronic System for Travel Authorization (ESTA)ESTA is an automated system that determines the eligibility of visitors to travel to the United States under the Visa Waiver Program (VWP). Authorization via ESTA does not determine whether a traveler is admissible to the United States.What is VWP eligibility?
**To be eligible to travel under the VWP, British citizens must have the unrestricted right of permanent abode in England, Scotland, Wales, Northern Ireland, the Channel Islands, and the Isle of Man.Open Countries For Travel and Tourism Unvaccinated Can Visit in 2022
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