They're giving the jab incorrectly, many are not aspirating the needle before they inject. If you go to the 12:50 mark, you will hear something very disturbing about the CDC and WHO on this particular issue.
Dr. Mercola does a pretty thorough job explaining this and is beside himself.
Warning: The COVID Jabs Are Administered Incorrectly
https://articles.mercola.com/sites/articles/archive/2021/10/22/intravenous-injection-covid-vaccine.aspx?cid_source=telegram&cid_medium=social&cid_content=mercola&cid=lead_20211022