Biosimilars are the medicines similar to biological drugs (obtained with the use of living cells) while "generics" refer to small molecule drugs (obtained by chemical synthesis).
Generics are considered identical and interchangeable while biosimilars are "only similar" and can not be automatically perceived as interchangeable.
The women should walk a little each day to improve her stamina & to prevent getting out of breath. She should walk a little and gradually walk more each time.
