Michael Schumacher is believed to be making very slow recovery after coming out of a coma in 2014.
Both team and driver will now turn their attention to shooting for their seventh titles next year, which will be the last of Hamilton's current contract.
Hamilton endorsed his declare to be the outright better of all time on Sunday when he secured his sixth drivers' world championship and third in successive years.
"It takes a long time to master a craft and, whilst I feel like I am mastering it, there's still more to master, still more to add to it, more pieces to the puzzle to add, more ups and downs along the way".
It was a worthy drive with which the Briton claimed a sixth world title, moving one clear of Argentine great Juan Manuel Fangio and just one shy of Michael Schumacher's record seven crowns.
Talking like a driver tired of playing Ringo to Hamilton's Paul McCartney, Bottas said he was already looking forward to next season despite the fact there are still two races left on the current calendar. But there's really very little to choose between any of them, so we could see a lot of different tactics in play tomorrow.
"We can sadly confirm that a team member lost his life in a road traffic accident when returning home on the evening of Monday 14 October,"said a spokesperson for Mercedes".
But Hamilton raced away, winning seven of the first 10 races. Niki Lauda, a three-time champion who acted as an advisor to Mercedes, died last May. "I would say this year that losing Niki, I didn't think that was going to hit me as hard as it did".
Lewis Hamilton takes his sixth F1 world title at the 2019 United States Grand Prix, finishing second behind team mate Valtteri Bottas. Cloud nine doesn't even get close, it's somewhere far above that. But for now, there remains a job to be done with two races left.
Hamilton feels his extraordinary feat has come at a cost. My step-mum, Linda, who's here today, she would make me a bacon sandwich and me and my dad would sit there together and watch the grand prix.
"Each and every single one of us is struggling with something in life, small or big".
"Just now, I saw my parents, my family, as I came in and I saw my dad's smile and that means it all to me".
Having achieved a lot as his sport's best-known ambassador, Hamilton's curiosity in social points has emerged extra ceaselessly, inviting him scores of controversy - as newest as earlier this month when he posted his issues for the enviroment and declared that the planet was "a messed-up place" he felt he wished to "give up".