It pains me when I see the University of Oxford making terrible errors. But errors are errors.
Both occurred in recent LinkedIn posts.
One in four people in the world do not have access to safe drinking water.
That should, of course, be does because the subject of the sentence is One, not four or people. This is a distressingly common error, but not one Oxford should be making.
Between 2000-2015, 3248 people were infected with plague worldwide.
Rewrite that as either Between 2000 and 2015 … or From 2000 to 2015 …
Two deplorable errors from people who should know better (and, obviously, two deplorable states of affairs in terms of public health).