I have noticed that much of the exciting human research on vitamin D originates in Turkey and Iran. I don’t know why, but researchers in those two countries keep published exciting clinical trials.
Take ear infections or acute otitis media (AOM). It is the most common infection that requires medical attention during childhood. AOM is the presence of fluid in the middle ear with acute signs of illness and middle ear inflammation such as bulging, cloudiness or redness of the eardrum. AOM is more common in the winter. It is unknown if it is latitudinal; that is, is it less common around the equator?