Serena is a scientist who is studying the connection between grief and sickness. She believes that when someone suffers an extreme loss, there is a physical effect to their nervous system. This makes them more susceptible to disease. What field would you say that Serena MOST likely studies?

PNI
TCM
Ayurveda
homeopathy

The field that Serena most likely studies is Psychoneuroimmunology (PNI), which is the study of the connection between the mind, the nervous system, and the immune system. PNI explores how psychological factors, such as grief, can impact the physical health of individuals by affecting their immune functioning.