https://arstechnica.com/gadgets/2021/02/mobile-world-congress-will-proceed-without-vaccination-requirements/

Mobile World Congress (MWC) will move forward this year, but vaccination will not be required for attendance when the Barcelona event takes place in June, according to organizers.

"Our view is it would be great if the world was vaccinated, but we can’t rely on that in 2021, so instead we’re relying on testing upfront to ensure our bubble isn’t just the Fira Gran Via but the whole of Barcelona," global mobile tech industry association GSMA's CEO, John Hoffman, told Mobile World Live.