From 2008 to 2010, there was a sudden increase in DF/DHF
cases in Jaffna District (Figure 1). The numbers of reported DF/DHF
cases in 2008, 2009, and 2010 were 58, 422, and 2648, respectively.
Due to the unsettled conditions that prevailed in the Northern
Province of Sri Lanka until 2009, there was no movement of
people from other parts of the island to the North Province and vice
versa. With the complete opening of the major entry route to Jaffna
in 2009, after the end of war, there was a sudden movement of
people in both directions, but the rate of movement has been
highest from other parts of the island to Jaffna. It appears that
the movement of people has contributed to the significantly higher
number of DF/DHF cases following the cessation of war.