Core Surveillance 9 ("cs9") is a free and open-source framework for real-time analysis and disease surveillance.
Read the introduction vignette here or run help(package="cs9").
cs9 stores its tables in PostgreSQL or in SQLite, chosen by the CS9_DBCONFIG_DRIVER environment
variable. SQLite needs no server: set CS9_DBCONFIG_DRIVER=SQLite and give each access level a
file path in CS9_DBCONFIG_DB_<ACCESS>.