Even if N.I.H. research ends in the US, China and other competently run countries will backfill and the world as a whole will not get impacted. I don’t see the big deal about the Trump administration gutting science in terms of global impact. Now, for US citizens, it might be more troubling but they will simply need to rely on the rest of the world.
"Simply". Healthcare costs will go up. Because US pharma will license things and charge a huge premium to sell it and you'll eat it, through your insurance, and you'll like it, because you won't have a choice.