Fair enough, of course any vaccine that does get distributed to billions of people should be tested very, very carefully. Chances are the first option might not be the best one (see the vaccine that's being rolled out in Russia).

But the article is talking about the logistics of distributing an effective vaccine, once it's found, not distributing the first best thing someone happens to come up with. It seems pretty likely that at some point a safe and effective vaccine will be found. Should that vaccine not be distributed widely?