I just read an article where the vaccine participa

I just read an article where the vaccine participants were experiencing high fever, fatigue, etc but state that the symptoms were less than covid itself. (How do they know?) I just finally got over covid and had those same symptoms. My question is, what are these 10-15% of patients experiencing when they say the vaccine doesn't work. Are these individuals needing mechanical ventilation due to their symptoms or hospitalization. Because only about 3-5% of normal population are requiring hospitalization when infected naturally. So why get vaccinated if you may need extensive care regardless of how you come in contact with virus. Just a different take......