portrait of old woman taking a self swabbing home tests covid19 with antigen kit

grandmother elderly stick tube introduce test antigen covid woman grandma coronavirus virus covid19 analysing sickness symptoms flu treatment holding infected antibody control fast sars pneumonia illness diagnosis home respiratory quick healthcare immunity prevention self vaccine omicron variant check medic protective outbreak human exam adult testing people portrait old taking swabbing tests kit for kit caucasian introducing nasal infection coronavirus quarantine pandemic