Define “immediately” in your context.
If a person has an active immune system it is very rapid. A suppressed immune system, not so much.
Many folks have had cytokine storms immediately after their clot shots. Does that count?
“If a person has an active immune system it is very rapid”
Give me the number of days or hours or minutes that you have in mind.
“Many folks have had cytokine storms immediately after their clot shots. Does that count?”
Cite your source.