器官缺乏 meaning in English

agenesia
agenesis

The organ shortage has fueled the creation of a number of websites and message boards where patients search for donors
由于器官缺乏，一些为患者寻找捐赠者的网站和留言板应运而生。
They noted that while 1 - year survival rates have increased over the years , " death rates beyond this period have remained more or less the same . " this may be the case because , while surgery has improved , patients undergoing the procedure today include older and sicker individuals , and more " marginal " liver grafts are sometimes used due to the shortage of donated organs
一年成活率提高了，但是死亡率在此之上仍然没啥改变，可能是因为，虽然手术技术提高，但是因此接受移植患者的年龄，病况都比以前高/差，因为器官缺乏，肝源没有以前好等因素造成。