Hi im getting the flu shot in october 2019 i was curious what are the side effects of the 2019 flu shot and will it give me a fever?

Usually coincidental: One's fever, nausea, and body aches are usually due to minor illnesses such as viral infections. Other causes are possible, but since typical flu shots rarely cause any reactions aside from at the location of the shot, such common symptoms like fever, nausea, or body aches are generally considered to be coincidences and have some other cause rather than a flu shot.