@book {1829,
	title = {Epidemiology and prevention of vaccine-preventable diseases},
	year = {2005},
	publisher = {Department of Health \& Human Services, Public Health Service, Centers for~{\textellipsis}},
	organization = {Department of Health \& Human Services, Public Health Service, Centers for~{\textellipsis}},
	url = {http://www.cdc.gov/vaccines/pubs/pinkbook/pink-chapters.htm}
}
@article {1822,
	title = {Parasites - Nonpathogenic (Harmless) Intestinal Protozoa},
	year = {2022},
	url = {https://www.cdc.gov/parasites/nonpathprotozoa/}
}
@article {1433,
	title = {Vaccines \& Immunizations},
	year = {2015},
	author = {Centers for Disease Control}
}
