I was delighted when I felt fit as a fiddle after receiving my first Pfizer shot to guard against Covid-19.gone for their second Pfizer jab. Some felt hundreds afterwards, but others felt awful and said they'd experienced worse side effects the second time roundWhy might some people experience stronger side effects after their second dose? We asked a series of health experts. important to note that Pfizer is a mRNA vaccine.
The immune system is already primed by the first jab. When you get the second one, your immune system recognises the proteins [The side effects that people commonly experience are flu-like symptoms such as body aches, fever, headache — like one would with a viral illness. This is because the immune system is responding as it would to a viral infection.Meyer is the head of the SA Vaccination and Immunisation Centre at Sefako Makgatho Health Sciences University.
When you get the first dose of the vaccine, your immune system is activated and your immune cells are basically “primed” or trained to identify and get rid of SARS-CoV-2 [the virus that causes Covid-19] without actually exposing you to this virus. This immune response includes an inflammatory response, which is responsible for the side effects. Though not experienced by everybody, these side effects are normal and usually mildtomoderate. Theyoptimal after the first dose, hence the need for a second.
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