word play jokes

I was working in the sun all day, putting finishing touches on the new deck outside my house. My sister pulled into the driveway, greeted me, and looked over my work.

"Wow," she gushed, "you're an expert."

Feeling complimented and satisfied, but trying not to seem egotistical, I responded... "Once you get going, it's pretty easy!"

She looked puzzled and wondering if I'd misunderstood her I asked, "What did you just say?"

She replied, "I said your neck's burnt!"

Q: What do you call someone who is terrified of getting their Covid-19 jab?

A: A catastro-pfizer