Charney, R., Rebmann, T., and Flood, R. (2014). Working After a Tornado: A Survey of Hospital Personnel in Joplin, Missouri. (Free registration required.) Biosecurity and Bioterrorism. 12(4):190-200.
The authors surveyed 1,234 healthcare workers from the 2 hospitals affected by the Joplin Tornado in 2011 to assess number reporting to work, willingness to work, personal disaster preparedness, and childcare responsibilities following the disaster. The vast majority of respondents reported to work the week after the tornado, and most indicated they would have used childcare at their hospital if it was provided.