The proportion of healthcare workers intending to accept pre-pandemic vaccination (H1N1 vaccine) was 47.9% when the WHO alert level was at phase 5. The respondents who were willing to accept H5N1 vaccines were more likely to accept H1N1 vaccines as well (91%); in contrast only 23.6% of those who declined H5N1 vaccination expressed an intention to accept H1N1 vaccination (P<0.0001).