Jack Schlossberg, grandson of former president John F Kennedy, has shared the heartbreaking final words his sister Tatiana Schlossberg said to him before she died in December.
In November 2025, Tatiana disclosed that she had been diagnosed with Acute Myeloid Leukaemia and explained that her prognosis was terminal.
That same month, she continued to advocate for vaccines in an essay for The New Yorker, taking a position that clashed with her relative Robert F Kennedy Jr, the current US Secretary of Health and Human Services, and his anti-vaccine views.
She wrote: “As I spent more and more of my life under the care of doctors, nurses, and researchers striving to improve the lives of others, I watched as Bobby cut nearly a half billion dollars for research into mRNA vaccines, technology that could be used against certain cancers.”
Only a few weeks after her diagnosis became public, Tatiana died aged 35, with the news confirmed in a message shared by the JFK Library Foundation on Instagram.
“Our beautiful Tatiana passed away this morning,” it reads. “She will always be in our hearts.”
Jack recently spoke about his sister during an appearance on CBS Sunday Morning, where he recalled that she urged him to keep going with his plans to run for Congress.
“The last thing that she said to me was, ‘You better win,’” Jack revealed on the show. “No one knew me better, and I knew no one better than her.”
Reflecting on life with Tatiana and their older sister, Rose Schlossberg, he added: “It’s brutal [to have two sisters]. Absolutely brutal. They don’t let you get away with anything. My style is never good enough. I’ve never gotten an answer right in my entire life.”
Even with the intensity that can come with growing up in that dynamic, Jack praised his siblings, saying they taught him “everything I know about how to be a strong person”.
Throughout her life, Tatiana frequently spoke about the need for climate action and highlighted ways to respond to the worsening climate crisis.
“I think climate change is the biggest story in the world, and it’s a story about everything,” she told NBC News in 2019. “It’s about science and nature, but it’s also about politics and health and business. To me, looking at this as a journalist, it seemed like a really important story to tell.”
“And if I could help communicate about it, that might inspire other people to get involved and work on the issue.”