noun
state of an illness; condition of a patient
Medical term used to describe the progression or current status of a disease or a patient's condition. Often appears in clinical contexts.
医師は病勢が悪化していると判断した。
The doctor judged that the condition of the illness was worsening.
病勢を正確に把握するために検査を行います。
We will conduct tests to accurately assess the state of the disease.
Compound of 病 (illness) and 勢 (force, energy, tendency), literally 'disease momentum'. The exact historical derivation is uncertain, but the term is conventionally used in medical contexts to refer to the state or progression of an illness.