As a result, the child may go on to have a permanently elevated level of stress, with its adverse implications for physical and psychological health.

CNN: STORY HIGHLIGHTS

Psychologists investigating eudaimonic versus hedonic types of happiness over the past five to 10 years have looked at each type's unique effects on physical and psychological health.

WSJ: University of Wisconsin Study Finds Eudaimonic Happiness Lessens the 'Bite' of Risk Factors for Disease

Opponents claim that at best, it is an unnecessary ritual, and that at worst, it is an operation that proves detrimental to the physical and psychological health of the patient.

CNN: Health

The children and young people, who are drawn into exploitive situations, face huge risks to their physical, emotional and psychological health.

BBC: Lancashire

Masks carry both physical and psychological benefits, said Dr. Julio Frenk, former health minister of Mexico and current dean of the Harvard School of Public Health.

CNN: Masks keep you from spreading illness