Which symptoms are worse… for the first or second shot?
It turns out that for AstraZeneca, side effects are more common after the first shot. Adverse effects were reported milder and less frequent after the second dose. On the other hand, for the Pfizer vaccine, the opposite seems to be true.
Side effects like fever, chills, fatigue and headaches were much more common after the second dose of the vaccine. Researchers are baffled by this phenomenon.
But it can be due to the fact that the AstraZeneca vaccine has an adenovirus vector, stimulating the immune system heavily in the first dose and less in the second.
…Now, let’s go into detail about how the vaccine can negatively affect you.