<prompt> Translate the following text to SwahiliHe noted that little is known about effective screening for certain sub-populations, so screening research still has its place.  <response>: Alisema kuwa kuna mambo machache yanayojulikana kuhusu uchunguzi wa ufanisi kwa idadi fulani ya watu, kwa hiyo utafiti wa uchunguzi bado una nafasi yake. 