"COVID-19 Vaccines: What They Are, How They Work and Possible Causes of Injuries"

"What They Are" - Poisons (unless they are just saline)

"How They Work" - Poisoning people (unless they are just saline)

"Possible Causes of Injuries" - Poisons. They cause poisoning, it's in the word poison, duh!

I didn't have to trawl through over 3 hours of video to work out. This took three minutes max. to type and check (I don't do touch type, give me a break!).