The Good Morning Britain presenter's husband, Derek Draper, remains in hospital after first needing treatment at the end of March.
Alongside a video of her children banging drums during the Clap for Carers tribute to frontline workers, Garraway said that the weekly gesture has been “a source of comfort.”
With Thursday’s clap potentially being the last after organiser Annemarie Plas called for it to stop, Garraway said that she “felt the tears come tonight to think it’s coming to an end before Derek’s ordeal with us.”
She continued: “But whether we clap or not next Thursday my eternal thanks to all in the NHS goes on.
“They are keeping Derek alive and every one of them is fighting as hard as Derek is to give us the chance to be reunited.
“It’s not easy but when I think of how hard Derek is fighting and the bravery of all in the NHS it helps.”
Garraway added that she is “having to find new ways of staying strong everyday” for her children Darcey and Billy “as I know Derek would want me to.”
She has been sharing regular updates on Draper’s condition following each week's Clap for Carers.
Last Thursday, she told fans that coronavirus has been affecting Draper, 52, in "new and devastating ways" every day.
"It's so wonderful to see little green shoots of hope that this dreadful disease is easing and that hopefully soon we might all be able to see each other again and hug our nearest and dearest," Garraway wrote on Instagram.
"But the journey for me and my family seems to be far from over as every day my heart sinks as I learn new & devastating ways this virus has more battles for Derek to fight.
The couple married in 2005 and welcomed their daughter, Darcey, a year later. Their son Billy was born in 2009.
Additional reporting by Press Association