white ceramic mug on white table beside black eyeglasses

Kelly Sikkema

Alexander Grey

Protective medical mask on yellow background surrounded with colorful pills. Creative concept of healthcare, hygiene, virus protection and medical treatment on coronavirus quarantine

Volodymyr Hryshchenko

National Cancer Institute

A thermometer is a device that measures temperature or a temperature gradient. A thermometer has two important elements: a temperature sensor in which some change occurs with a change in temperature; and some means of converting this change into a numerical value. 

Kristine Wook

Patient with surgical bonnet before surgery.

a man holding his hand up in front of his face

Towfiqu barbhuiya

A closeup of a chemotherapy IV in a patient's hand.

Visualization of the coronavirus causing COVID-19

Illness