COVID-19 hitting too close to home?

My co-worker’s best friend family got infected early Jan. The friend’s wife and daughter recovered, but the friend was hospitalized 2 months. Over the weekend the friend passed away. He was in his early 50s.
My nephew was tested positive for covid antibodies, but didn’t have any symptoms, except now he feels fatigue with brain fog. He just got his first shot of vaccine a week ago. We are hoping the vaccine will help with his symptoms.