Bivariate association between participant's characteristics and the uptake of A (H1N1) influenza vaccine.

*p-values were based on χ2 test or Fisher's Exact test.†Underlying diseases included chronic respiratory diseases, chronic metabolic diseases, chronic heart diseases, liver diseases, kidney diseases, and immunodeficiency diseases.‡High-risk groups included people with an underlying disease, pregnant women, children age five years or younger, and elderly people aged 65 years or older.§School-going children included primary school students to university students.