Nice little trap there, GG.
If the answer is "Yes I do have credentials" (for example, I -am- a hospital administrator and have run outpatient clinics) then obviously I am one of the Nazis who iss trying to kill der kinder vith Zyklon B.... oops, whooping cough vaccine.
And if NittanyLion answers that he does not have credentials, then obviously his opinion is no more valuable than the bug-f--k insane opinion that vaccines cause autism.
Notice, ever since I asked for some facts, DumpedTea has suddenly become scarce...