Some good sources of information you should be monitoring:
- Wikipedia 2009 swine flu outbreak page
- WHO Epidemic and Pandemic Alert and Response
- PandemicFlu.gov (US Government information and advice)
- Center for Disease Control and Prevention (US Government)
If you haven't put some form of pandemic plan in place, now is probably a good time to do so.
Note: there is a software package which can help speed up your planning here. I don't know of any others. [Disclaimer: I helped create it.]
[Updated: fixed error in twitter search link.]
