Antivaxxers rail against all vaccines. Your "less than five years testing" straw man is problematic when they have issues with polio and smallpox vaccines, MMR,

Antivaxxers rail against all vaccines. Your "less than five years testing" straw man is problematic when they have issues with polio and smallpox vaccines, MMR, etc., some of which have been around nearly half a century. Being honest, NO amount of testing would be an acceptable amount/duration for a significant portion of that group.