How To Get Accurate Body Temperature Readings For Both Adult

When talking about adults and children, the accurate way to measure their temperature is by using a digital thermometer. For instance:

From newborn to the age of 5, the best way to take temperature is under the armpit. 
For children above the age of 2, the best way to take temperature is by ear or mouth. 
For adults, the accurate way to take their temperature is by mouth, in the ear or under the armpit.