In small molecule the second player can just copy. With vaccines this is harder but a lot of the risk is already gone. Development encompases everything from to

In small molecule the second player can just copy. With vaccines this is harder but a lot of the risk is already gone. Development encompases everything from tox, to dosing, and there is much risk at every step of the procees. For small molecule the lead is going to get massive amounts of small variations made and tested to try to find the one that works: that's not coming from the research that lead to a paper with a hit.