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Most experts have concluded that the value of performing temperature checks is limited for several reasons:

  • Studies have found that up to 2/3 of infected people have no symptoms, so checking their temperature won’t identify them.
  • Normal body temperature varies from person to person, making it difficult to determine the threshold for fever in all individuals.
  • Fever can be masked by taking fever-reducing medication.
  • Accuracy of the thermometers depends on exact use and calibration. The measurement can also be affected by outside influences such as humidity and sweat on skin.
  • Temperature checks can give a false sense of reassurance that a person is safe, free from infection and free from being around anyone that is infectious.