My friend's little sister is really sick. She has the flu. She's been sick for 5 days
She vomited or coughed up blood for over half an hour on Thursday so her sister took her to the doctor. She's only 13.
I'll be hearing from the friend if her sister recovered or not tomorrow. I hope she's okay.
I think the flu can be both mild and serious. A person's reaction to the flu varies. Everyone's different.
I just want to say that people with immune deficiency, like AIDS or something, they die easily by illnesses that the majority of the world never get. A small cough that wouldn't harm another person in any way can easily kill them.