Coronavirus testing. The doctor holds in her hand a test tube with a blood sample with a negative result. Close-up. Selective focus. - Stock Photo & Image

Coronavirus testing. A nurse is holding a test tube with a patients blood sample.

Coronavirus testing. A nurse holds in her hand a test tube with a blood sample with a positive result. Close-up. Selective focus.

The doctor holds in his hands a test tube with blood for analysis of coronavirus, close-up of hands.

Coronavirus testing. A nurse is holding a test tube with a patients blood sample.

The doctor holds in his hands a test tube with blood for analysis of coronavirus, close-up of hands.

Coronavirus testing. The doctor holds in her hand a test tube with a blood sample with a positive result. Close-up. Selective focus.

Coronavirus testing. A nurse holds in her hand a test tube with a blood sample with a positive result. Close-up. Selective focus.

Modern electric toothbrush in the hands of a dentist, close-up.

Coronavirus vaccination. Detailed close-up of doctor giving an injection to patient.

Vaccination of children. Woman doctor makes injection to teenage girl. Close up of hands.

Coronavirus vaccination. Detailed close-up of doctor giving an injection to teenager.

Vaccination of children. Woman doctor makes injection to teenage girl. Close up of hands.

Vaccination of children. Woman doctor makes injection to teenage girl. Cropped shot.

Vaccination of children. Woman doctor makes injection to teenage girl. Cropped shot.

Vaccination of children. Close-up of girl holding on to her shoulder at injection site.