^aIncludes specific etiologic information, reservoirs, portal of entry/escape, mode of transmission/dissemination, susceptible hosts, incubation period, seasonal distribution, age/sex/race/religion/occupation relationships, mortality and zoonotic classification.
^bLists occupations with increased potential for exposure.
^cLists countries where the disease is known to occur.
^dDescribes additional disease attributes not fitting other categories.
^ePop-up definitions of medical terms and concepts in the knowledge base.