While responses to a sneeze may vary across different cultures, most aspects of sneezing are universal. For example, no matter the language, “Bless you,” “Gesundheit” and “Banish the omen” all show a sign of respect for the afflicted party.
Sneezing seems to be more prevalent as the weather gets colder, due to the increased presence of ragweed and mold in the fall. Then, as winter approaches, people are forced indoors, where they are more likely to be affected by airborne irritants trapped inside.
Source http://news.allergybegone.com/
Source 
