Florian found out that her grandmother passed away and has intense grief. how has this most likely affected her social health?

She experiences profound guilt and cries uncontrollably.

Explanation:

When someone lose a loved one, people emotinally collapse, experiencing an intense grief, which has stages. First, the person denies and isolates himself, it's a shocking state. During this time, the person who is griefing, tend to avoid social contact, which affects social health, in this stage the person is continuosly crying and blaming himself.

Then, the person begins to experience anger and severe depression, the grief now isn't relief by crying but by finding an external reason. At the end, when the person overcome, he or she begins to accept reality. So, basically social health is damaged at the beginning of the grief.