|Origin:||uptake 'to understand' (18-20 centuries).|
|Origin:||up + take|
to be slow or fast at understanding something
the number of people who use a service or accept something that is offered:
The uptake of some vaccinations fell as the media stirred up fears of possible side effects.
3 [uncountable and countable]
the rate at which a substance is taken into the body, a system etc:
the uptake of sugars by the blood