I know the articles mention they have yet to be tested on humans as you yourself have also pointed out...but it is really important to remember you see lots of drugs that are amazing in vitro but you get to humans many are not as successful.
I know people are really keen to hear about possibilities that offer hope, but I would remain sceptical until we have good human trial evidence.
They can even work well in animal studies but not in human trials.
For three years before I switched my path and went to law school, I worked in biomedical research. Our lab had 3 main streams but one of them was to come up with drugs that could treat lymphoma - and for every 50-60 compounds that looked promising in the lab, maybe 1 or 2 would be taken over by a pharmaceutical company for further testing.
The good news here is that there is a lot of collaboration around the world to come up with effective treatments, and later a vaccine. Not to say that there isn't usually, but these are extraordinary times and researchers are united in their work for the greater good as opposed to more direct funding for their lab or institution.
MrsS - did you see the trick with a paper clip to hold behind your ears?