Obviously there is no hard number, especially this early on. But it’s not about YOU or any other one person who has been vaccinated. Yeah, YOU now have immunity. How does that work. The vaccine teaches your immune system how to fight the virus. You get the virus, your immune rings the alarm, the antiphagewhitecellsthingies or whatever they are spring into action and start attacking. They win the war. But it takes awhile. During the time the battle is raging on, you can be infectious. While masks give you some protection against getting infected, which YOU no longer have to worry about, their main purpose is to stop YOU from spreading it. Wouldn’t it be nice if it started spreading a little slower than it has been? Get back to some semblance of normal a little sooner rather than a little later.