Figure 3
Number of messages sent over public health agency email listserv per month from 2008–2010. The two waves of the 2009 H1N1 pandemic are marked by dramatic increases in messages.
Figure 3 | BMC Health Services Research
Number of messages sent over public health agency email listserv per month from 2008–2010. The two waves of the 2009 H1N1 pandemic are marked by dramatic increases in messages.