I have gotten progressively ill and recently have to use a wheelchair. I'm trying to get used to a chair with wheels and its hard. 
Oh no, i'm so sorry to hear that but also I'm curious to know when the first wheel chair was made
Goodness, I think they've been around since almost the beginning of time.  I saw a show that talked about seeing images of them around 525CE in Chinese art.  
Wheel chairs must be strong, what are they made of?
Now a days, they are made of metal and flexible plastic for the seating portion but mine is made of metal and more of a hard plastic because its powered; which involves batteries to help it move on its own.
Which country produces the best wheel chairs?
centuries later in China; the Chinese used early wheelbarrows to move people as well as heavy objects. A distinction between the two functions was not made for another several hundred years, until around 525 CE, when images of wheeled chairs made specifically to carry people begin to occur in Chinese art.
Although Europeans eventually developed a similar design, this method of transportation did not exist until 1595 when an unknown inventor from Spain built one for King Phillip II. Although it was an elaborate chair having both armrests and leg rests,
and sort of wrap up that storyline ... I want them to know that I'm down with it if they want me to, but I completely understand if it doesn't necessarily work ... They've got a lot of story lines going on there." But in March 2012, Shonda Rhimes said that there are no plans at the moment for the character to return, "I think it was really nice to hear her appreciating the show. At the same time we are on a track we have been planning. The