elderly medical doctor with protection mask

50 60 age aged bacteria bird breathing care caucasian cold copy crossed diarrhea disease doctor ehec european face family flu gray heal health healthy hospital hygiene ill infect infection influenza male man mask mature matured medic medical mouth mouthguard nurse nursing operate operation pathogen physician portrait precautionary profession protect protection research science serious space standing stethoscope surgeon surgery swine trust trustful trusthworthy verticasl virus