The 45-year-old suffered serious injuries in a fall at a resort in Meribel in December and only recently came out of a coma.
Schumacher was transferred from Grenoble hospital in France to Lausanne hospital in Switzerland last month as the German continues his recovery.
And, ahead of this weekend's grand prix in Schumacher's home country, his wife Corinna showed her gratitude to the many well-wishers.
"This is a message to all of you who have lived a passion for Michael's sport in all the years together with him, and who have supported him in the past half year off the track as well," she wrote in the programme for the German Grand Prix at Hockenheim.
"The German Grand Prix gives me the perfect opportunity to cordially thank you all for the good wishes and positive energies you keep sending to Michael.
"I have to say your sympathies literally blew us all away. [It is] good to know that together we made it through the hardest time.
"Now we are facing a phase which will presumably take a long time. We trust that - as for so many years in F1 - time will be Michael's ally in this fight. Until then I would like to wish you and your families all the best as well."