A female doctor or nurse is tired and upset at work. The health worker is saddened. Omicron inscription on black background. Photo of a woman wearing a medical protective mask on a black background. Pandemic covid 19 concept, Omicron Ba.4 and Ba.5

A female doctor or nurse is tired and upset at work. The health worker is saddened. Photo of a woman wearing a medical protective mask against a black background. Pandemic covid 19 concept, Omicron Ba.4 and Ba.5. Depressed surgeon leaning on desk at hospital. Healthcare workers in the Coronavirus Covid19 pandemic