Science

 When is enough, enough?

There are many complex things we experience.  In the scientific world there is a method where theories are advanced and whatever one best explains the data becomes accepted.  While probably not obvious even long established science theories change of a better explanation arises.

Clearly the longer a theory is accepted the least like it will change.  Still new advances can change even well established theoris.   Before relativity we felt comfortable with Newton's theory.  That still works for almost everything but situations that few will experience.  

So consider the Coronavirus.  Certainly the early theories were sure to change and they did.  This is simply the way science works but because it was a life threatening situation, the early theories were shared.  So don't wear a mask turned into wear a mask.  No conspiracy involved.