Basic epidemiology 2026-02-15T15:25:07+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Bonita, R.; Beaglehole, R.; Kjellstrom, Tord (World Health Organization, 2006)