LEADER 00000cz 2200157n 4500 001 sh 85002726 003 DLC 005 20010430104449.0 008 010327i| anannbabn |a ana 010 sh 85002726 040 DLC|cDLC|dDLC 053 0 RA642.A5 150 Airborne infection 550 |wg|aAir|xMicrobiology 550 |wg|aCommunicable diseases|xTransmission 550 |wg|aInfection