Jeopardy! host Alex Trebek shared a health update marking the one-year anniversary of his pancreatic cancer diagnosis.

“I am very happy to report I have just reached that marker,” said Trebek in a video posted to Twitter. “Now, I’d be lying if I said the journey has been an easy one. There were some good days, but a lot of not-so-good days.

“The one-year survival rate for pancreatic cancer is around 20%,” said Dr. Dae Won Kim, a medical oncologist in the Gastrointestinal Oncology Program at Moffitt Cancer Center.

The 79-year-old responded well to his first round of chemotherapy in May, but experienced a set-back in September while undergoing immunotherapy. As a result, Trebek resumed chemotherapy.

Kim says only about 1% of patients who have a specific gene mutation respond well to immunotherapy. He adds there is a big push for more treatment options; there are currently some clinical trials including chemotherapy, targeted therapy or immunotherapy depending on patients’ condition and tumor molecular test results.

Trebek says he is staying positive and setting his sights on hitting the two-year mark. “[My oncologist] said, Alex, even though the two-year survival rate is only 7%, he was certain that one year from now the two of us would be sitting in his office celebrating my second anniversary of survival.”