You didn't supply the text, but i can infer she probably wears a hospital mask, washes her hands regularly, or covers her mouth when coughing or sneezing.
Having or showing dogged determination not to change one's attitude or position on something, especially in spite of good arguments or reasons to do so.
Top two chambers of the heart
In a lot of cases, many people are unaware that they have HIV/AIDS, therefore it doesn't get reported and they end up spreading it to those they share beverages with or have sexual interactions with.
