New study reveals link between depression, reduced microglial brain cells As current treatments prove ineffective for up to 30% of patients, the need for deeper insights into depression's underlying mechanisms becomes increasingly urgent. depression, anxiety, sad, emotion, girl, unhappy, depressed, introvert, woman, alone, cartoon, mental, health, stress, disorder, disease, fear, mood, sadness, psychology, sorrow, tired, stressed, loneliness, frustration(photo credit: MOHAMED HASSAN/PIXABAY)