Nina has the flu and a high fever. Her immune system is exhibiting the line of defense. This defense is part of immunity.

you aren't worthless, you are a one of a kind person who, deserves happiness like anyone else, you may not get it but everyone deserves happiness. i hope this .

it means your tired?

because health skills are tools and strategies and also practical skills are also something you need to learn (like tools and strategies) and put it in reality.