In 2005 I had contracted whooping cough due to the vaccine wearing off. I had also gave it to my 7 week old daughter. I was told by an infectious disease doctor that the vaccine does wear off, but since both my daughter and I got whooping cough and survived we are immune for life from whooping cough. I read what the college educated idiot scientists from the cdc said about natural immunity wears off also. That is false! It seems that any infectious disease that upends their agenda about covid19 natural immunity has been rewritten. Don't believe me check it out for yourselves!