In a video posted to the Jeopardy! Twitter account today, legendary host Alex Trebek shared that he has been diagnosed with stage 4 pancreatic cancer.\nThe Canadian icon vowed to "fight this and keep working" and, "with the help of family, friends, and your prayers [beat] the low survival rate of this disease."\n"I have to. Under the terms of my contract, I have to host Jeopardy for three more years," the host joked.\nALSO READ: Montreal's Most Authentic Greek Restaurants\nTL;DR Alex Trebek has shared that he has stage 4 pancreatic cancer. Twitter has erupted in messages of support. Below are compiled just a few dozen.\nWatch the video below:\nA Message from Alex Trebek: pic.twitter.com/LbxcIyeTCF\n— Jeopardy! (@Jeopardy) March 6, 2019\nCountless thousands of people across North America have taken to Twitter to share their love and messages of support for Trebek. Below are compiled just a few dozen.\nAnswer: Alex Trebek.Question: Who is an absolutely legendary Canadian? Our thoughts are with you. Fight the good fight, sir. https://t.co/SPByf2PpMm\n— Green Party Canada (@CanadianGreens) March 6, 2019\nMany commented on Trebek's magnetic personality, and commanding but quirky presence and, in keeping with the joy and generosity that Trebek radiates, used humour to express their love for him.\nAlex Trebek is the uncle at Thanksgiving who's slightly disappointed you got a B this semester. He is irreplaceable.\n— Louis Virtel (@louisvirtel) March 6, 2019\nWhile some expressed sadness and fear...\nGoddammit, not Alex Trebek 😔\n— Darik Maurice (@DarikMaurice) March 6, 2019\nthis Alex Trebek news pic.twitter.com/nmbXiY1PX2\n— nic (@wherescena) March 6, 2019\n@660NEWS RUDE! That one extra letter would have saved me the heart attack. #AlexTrebek pic.twitter.com/n49mLhe9K8\n— Calin Way (@CalinWay) March 6, 2019\n... many praised Trebek's character and remarkable strength. He is truly a model human being.\nIt’s too bad the rest of humanity isn’t more like Alex Trebek. We would’ve figured our shit out eons ago.\n— J.T. (@JamesEditsFilms) March 6, 2019\nAlex Trebek is a fucking legend.\n— Arielle (@ArielleEJ) March 6, 2019\nAlex Trebek has cancer pic.twitter.com/0BiNLSo20S\n— ME$$Y MEL (@DamnGirlMelanie) March 6, 2019\nReactions have been emotional.\nI did not anticipate that I would immediately start crying upon hearing that Alex Trebek is dying of cancer\n— White Trash Peg (@whitetrashart) March 6, 2019\nWhen you hear the news regarding #AlexTrebek and his health...What is: Fuck Cancer. With you all the way, Alex! @Jeopardy @jeopardy #cancersucks #keepfighting\n— ugadawg414 (@ugadawg414) March 6, 2019\nMany others are sharing their favourite Trebek moments.\nI think almost every day about how there was once a terrible genre called nerdcore hip hop and then Alex Trebek ended it. https://t.co/JjswutlhoE\n— Joe Macaré (@joemacare) March 6, 2019\nAlex Trebek has been hosting Jeopardy since 1984 and I was born in 1987. I haven’t had to live in a world without Alex Trebek’s Jeopardy and darnit I don’t want to! pic.twitter.com/WYu8gyuBRd\n— AMP (@AnnPetersen15) March 6, 2019\nBut everyone is rallying behind the Jeopardy! host. He is a national treasure and thousands of people are sending him good wishes.\nDear Cancer:You can't have #Alextrebek . Thx,Everyone\n— PhynyxRising (@PhynyxRising) March 6, 2019\n2019 needs to fuck off, man. For real. You will not take Alex Trebek away from us.\n— Marcus, the Proud and Grateful Democrat (@nirvanafanclub) March 6, 2019\nAlex Trebek is forbidden to die. Everyone else may die before Trebek does, but Trebek is untouchable thanks\n— 🇵🇷Jacob Dickens🇵🇷 (@horshedbookends) March 6, 2019\nThe man has a truly resplendent presence in this world. If anyone personifies integrity; it’s Alex Trebek\n— M. Holland (@YourAnonFlorida) March 6, 2019\nMany are determined to help and root for Trebek in any way they can.\n2019 better get it’s gotdammed grubby hands off alex trebek.\n— sherryrose (@sherryrose) March 6, 2019\nAlex Trebek is the TV celebrity I would rather have had as President. Of course, there's that whole "he's Canadian" and thing, but still.\n— Dan Brookens (@DanBrookens) March 6, 2019\nI never knew I cared this much for Alex Trebek until I watched this and actually started crying. https://t.co/1T7dFO27iS\n— Emmalynn Mathis (@EmmalynnMathis) March 6, 2019\nI have to be clear about this, and I mean every word:Alex Trebek is not allowed to die.\n— Adam Jacobi (@Adam_Jacobi) March 6, 2019\nTrebek has been a pop culture figure for decades.\nDear God, I regret to inform you that you may not have Alex Trebek. We still need him here. Thank you for your understanding\n— elan gale (@theyearofelan) March 6, 2019\nPlease direct any surplus positive energy you possess at this time to Alex Trebek. Thank you\n— Patrick Monahan (@pattymo) March 6, 2019\nalex trebek can have my pancreas. i'm not using this thing i don't even know what it does.\n— elon tesla (@bobby) March 6, 2019\nHe is an integral figure in the media landscape.\nI’ve said this before but Alex Trebek is in a way the last Cronkite: authoritative, reassuring TV voice you hear every night, almost to the point of ritual.\n— Ken Jennings (@KenJennings) March 6, 2019\ni don’t even believe in god but i will pray for alex trebek\n— Brandy Jensen (@BrandyLJensen) March 6, 2019\nFinally, we can all get behind this sentiment:\nWe are all pulling for Alex Trebek who just revealed he has stage 4 pancreatic cancer. He vows to fight this and to keep working. We're with you, Alex.\n— David Muir (@DavidMuir) March 6, 2019\nWe're rooting for Alex. It's inspiring to see that so many people care so deeply for him. We hope he knows.