I'm one of those critical thinkers who did not get any shots, let alone boosters. I retired from a national lab. In fact, they call those of us who worked there "cold war warriors." I'm not uninformed. But the Ukraine situation is very complex. Putin was not on the scene when Reagan was in power except as a mid-level KGB officer. It was Gorbachev, who was a person who actually "tore down that wall." You might want to read a bit more history.